This story is told in your chart. You just provided the details.
Mars represents injuries in general. In this trine to your Venus, it shows your prebirth injury. Seventh house/DC represents the doctor who treats you (among all the other things seventh house/DC can stand for). Mars on the DC: your injury is iatrogenic (doctor caused). Jupiter's involvement shows some more detail: you were very big (Jupiter = bigness) and your mother had diabetes, which is a disease of excess (Jupiter = excess). Were you ultimately born by c-section, by any chance? Mars also indicates surgery.
Your Mars/Venus trine, while tight, is separating. A separating trine is a gift that's already been received, either at birth or early in life (an applying trine, in contrast, would be a gift in the process of being given, and would manifest more gradually over your lifetime). In this case, the "gift" is the injury you were born with (Mars stronger than Venus--however, having Venus and Jupiter in your corner in the first place may be the reason, astrologically, that you survived). If this were an applying trine instead, you would more likely have received a disabling injury in your infancy or childhood. Possibly even later in your life.
That your disability affects your brain and nervous system is reflected in Venus's third house placement. And the Scorpio placement of Venus, plus a very busy fourth house, suggests a hidden disability: Scorpio is hidden things, and so is the fourth house.
Happy birthday! I hope validation for your life story is a good birthday present.