Emotional stress about a rape

So about 6 months ago I was raped. I had a really emotionally abusive boyfriend and obviously physically too. I have only told two very trusting and loving people in my life. But I have never actually talked about what happened to me. I've debated many times talking to my best friend/ current boyfriend about it. He was the one that got me through it, and he did that long before we even decided to date. I trust him with my whole heart. I don't know where to start though. Does describing the situation and what happened help? I get medical tremors when I get stressed or have an increase in anxiety. I want what happened to bother me less so I don't get tremors anymore. I just don't know where to start. It's a heavy subject and any advice would be helpful.