Rape? ⚠️TOUCHY SUBJECT⚠️

Ok so I know this topic is touchy but I'm very conflicted. 
Last year I was raped by my ex boyfriend. Six months later I was sexually assaulted by another ex. I have never told anyone this except recently to my boyfriend of 2 years. We've been talking about sex recently but he's scared it might be a trigger and he's also worried constantly about doing something that might hurt me. What should I do/say to him?