For background, a few years ago I was sexually assaulted by an ex girlfriend. Since then, I've found that sexual scenarios in media, consensual or not trigger anxiety attacks that evolve into panic attacks.

I have no idea what to title or tag this. I guess o just need advice.
So I currently live with my mother and brother in a studio apartment, because when we moved here, that's all we could afford. I have been abused all my life which has lead me to have psychological disabilities which in turn makes finding work incredibly difficult.(generally the only reason I'm still living here) Recently my brother started dating, which means she's here every day, despite the family knowing about my issues regarding additional people around as well as the fact that we've outgrown this place and there really isn't room for her. Here's the thing, the way our apartment/furniture is set up, my brothers bed is beside mine and my mother sleeps on the floor/loveseat. The past couple weekends and the past few days (since they're on winter break), on more than one occasion I've woken up to see him on top of her, heard them have sex while I was laying on my other side and then they go into the bathroom and have sex while I'm home. The first time I brought up to my mother, rather talking to him, she told us to "talk about it," and he refused to talk to me because there "was nothing to talk about." Since then they either proceed to do it more or I'm noticing it more.

See.. I have selective mutism that's often triggered by my social anxiety and so if I get anxious enough I can't physically speak. Other times, if my mutism doesn't kick in, I get overwhelmed with emotions and can't speak. I don't know what it is but it makes me.. aggravated then gradually irrationally pissed off, then I can't speak and sometimes can't move either. So I'm just locked in place with my thoughts. I don't know where I'm getting at.