Is what I’m feeling normal

So about 6 months ago I was raped by my roommate. I never really accepted that it happened I kinda just pushed it to the back of my mind and try to forget it. But every once in a while something will happen and it will trigger this feeling of I guess vulnerability is the best thing to say. For example my boyfriend can pull my hair and it turn me on but I just had a guy as work come up behind me and pull my hair and it just freaked me out and it just froze and couldn’t say anything to him. Is what I’m experiencing normal.