I had to chime in here, as I'm a female and I have been going through this for the past 2 years.
Original poster, how old are you? That will weigh into things here.
In my experience it is not enough to have the biological cycle in order, or just the astrological/lunar one with great aspects. I have had some fantastic aspects for pregnancy come during times of the month that i was not fertile -- nothing can happen in that case. you need BOTH things to align, medically and astrologically, for the best chances.
Also for the record the egg, once released, survives for up to 12 hours in your body. Healthy sperm lives an average of 3 full days but up to 5 in some cases. As Rahu pointed out you want the sperm in your tubes ready and waiting for when the egg is released. Egg release can also vary - a day early or late, 12 hrs early or late. There are forums and books on this too regarding the frequency of intercourse to maximize 1) sperm quality and 2) chances of conception.
Vitex helps some people more than others. Depending on your age it can increase estrogen too much. Estrogen works in balance with progesterone so you cannot increase one without affecting the other.
Since you noted you're not into fertility treatments or invasive medicine, there are other natural methods that help. It would be helpful also to find out the reason for you lack of periods. Is it low weight (you may think you're normal weight but in terms of fertility may need to still add a few pounds); is it too much stress in your life (that can stop cycles); is it a hormonal disbalance? is it another medical disorder like PCOS? blocked tubes? other? Once you pinpoint the medical reason you can address it.
I woudl disagree with any doctor who says sometimes having a period is not normal. When you're trying to conceive every month counts, and the month you dont ovulate is not, then, helping you.
Anyway to natural treatments:
1) ACUPUNCTURE works wonders. It sounds fluffy but what it does is regulate the circulation of blood in the body. If you are not releasing blood, the body is holding onto it or the circulation is unbalanced.
2) take a multivitamin starting NOW with at least 400mg of folic acid and DHA/EPA if you are not already. You need to prime the body for pregnancy and it requires 3 months of that before it is fully ready and healthy to conceive. If your vitamin reserves are not balanced that can be another reason cycles are not regular. Think of your body as a garden, you dont just throw a seed in the ground and expect it to grow. You prepare the soil weeks in advance, you water it, you give it sunlight. Same concept here.
3) exercise (not heavy cardio to lose weight but some exercise each day), like a 30 min walk
There is a great book also called Fertility Wisdom, if you can find it it is worth ordering. If you are serious about pregnancy, I'd advise reading it as it is also an acupuncture-based approach. but it includes which foods to eat depending on what you are deficient in. for example, I had to stop eating cold salads and eat more warm foods in order for my cycles to regulate..
I hope this helps. Also if you have access to a good physician and healthcare where they can take ultrasounds of your follicles, you can then find out if you are producing enough follicles and eggs, and when you are ovulating. That will also help regulate things and allow you to plan better.
After all that is in order-- the aspects that others mention will help a GREAT deal in terms of conception, but the medical part has to be in order too.
But your answer was very helpful. A little confusing but that is only because I am still new at astrology. I have been studying for a few years, but its still a lot to take in. I hope I understand better soon though!
I didn't want to ask if this year I would get pregnant(though I would love for the answer to be yes!) because I guess I was too afraid it would be a no or maybe next year. I've been wanting a child for almost seven years. Yeah I know I'm still young, but its just what my heart wants. And when I was younger I was a little under weight, but now I would consider me normal weight for my size. Two of my previous doctors said it was okay for me Not to have a period and for some women its normal. And the only time it would be a problem is when I'm actually trying to conceive. Which now I am more than ever. They said then I would probably have to go on fertility treatments. Which I wouldn't want to do and would want a natural approach to me balancing my system. So I hope me continuing the Vitex regime is a good thing! 
Your responses have been very helpful. Though I'm not so happy about the whole this year OR next year may not be my year
But I now know to be careful for what I ask for. But none the less I will keep trying. Hey you never know! And if not at least I know I only have Two years to go! Good thing time flies. I still can't believe it May! But anyways thanks you guys, and I will keep an eye on my charts and do some more research. Lots to learn! If you have anything else you would like to share or any advice or anything, please do so. I could always use some help with this learning process. 
