Touchy topic: sexual abuse survivors

As a child I was raped anally by my step brother. As an adult I used to love anal because it pleased my fiancé but recently I've started having flashbacks when ever anything like that happens. The last incident I started bawling uncontrollably and I thought my fiancé was my abuser. I thought I was a little girl. I know this is a hard topic, but I feel like I have to talk about it somewhere. I think it's happening now because I've suppressed it all this time. Has anything similar happened to anyone else?