Probably best to forget about the Saturn-Pluto transit - this will be the same for everyone born with Pluto in that position and that is a HUGE group, therefore you are unlikely to feel it personally.
Conjunctions indicate times when a natal planet's usual expression of its energy is "overtaken" by the energy of the transiting planet. Sometimes, the individual isn't aware of the conjunction's effect, it may be other people who notice it first. The Moon in the first house suggests you are probably a bit of an open book, emotionally. You usually wear your heart on your sleeve, and people have very little difficulty telling what you are feeling - it shows in your face, in your personal vitality, in your self-expression.
Saturn represents restriction, limitation, inhibition and also fear and anxiety. Now it may be that this Saturn transit brings with it a change in the way you normally express emotion. From being an open book, you may become rather taciturn, perhaps a little buttoned-up. It may be that, for the duration of the transit, people are no longer able to readily discern what you're feeling. Natally, Saturn is in your third house, so it's possible that a communication of some kind brings this situation about. Saturn also rules the third house, emphasising that the impact of this transit may be felt in your communications. Of course, Saturn is the great headmaster, so whatever happens, there will be a lesson to be learned from it.
Hope that helps