I was raped and miscarried

I wanna make a few things clear before I ask for any advice. (edit: My ex and myself have broke up 2 years ago, i cut him out if my life before he raped me at a party) I was raped by my ex in April, filed a police report and he did get arrested. I never followed up any appointments after that I was still in complete shock and depression I never wanted to leave the house. My periods are very irregular so missing one isn't new to me. A few weeks ago I started dating this new amazing guy who knows nothing about any of this. I ended up having a miscarriage yesterday, I got pregnant when I was raped, cause I had no intercourse ever since then. I'm heart broken and crying and I don't know if I should explain it to my current boyfriend and how? I already have a baby with my ex so no matter if this one was forced or not I would've kept it, I felt as if I lost another piece of me again. I don't know how I could explain this to my boyfriend or how he would react. This is so much pressure for me I can't imagine what he's going to think.