I am so sorry for your turmoil and suffering right now. It can be so hard to go it alone when nobody (especially family) cannot or will not provide answers for you(or are the cause). Know you are not alone in this universe and unfortunately many of us know your pain.
If you need to find healthier alternative ways to deal with this, talking to a therapist or counselor, even for a little while, can really help provide the support to get you through. What you're dealing with is horrifying and ugly and if it's impacting you, then don't stuff it back or put it to the side, take control and fight it. realize your worth, I don't think you're overreacting at all. Maybe its bubbling up because you're ready to take it on...

Hugs Xtended....hugs to you.