I need to know

So as much as I'm gunna hate posting this on here because it's embarrassing asf, I need answers. For the past 2 years ive had this problem where I'd puke trying to have intercourse. No matter who it's with it happens and I get those odd days where it doesn't happen at all. My boyfriend now thinks that I find him unattractive and that's what causes my puking when in reality idk why I puke and it destroys me. This problem started to happen after I was raped by my at-the-time bestfriend and at-the-time boyfriend. If anyone has a idea of what could be causing me to puke when aroused please comment below !!!! I'm desperate to get this to end......