How do I get over trauma?

I was SA'ed as a child multiple times, one being by another kid my age at the time and the other by my own step-dad, and both got away Scott free, (I'm not sure about the me being Sa'ed by another kid, but I believe the police never took it seriously because we were both kids)

I've have now been in a relationship with a man I really do love for a bit now, but I've been wanting to get intimate for a bit now but im still scared from my past, honestly, just nervous overall.

One night something did start between us, but I broke down unexpectedly when he simply just pressed his hips on my butt. I need some advice on just how to make myself less anxious about this stuff I should say? (I really don't know how to word this I'm so sorry) any advice will help though.

How do I get over trauma?
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