Dealing with anger after a miscarriage.

I was recently seeing a guy, R, since August and found out that I was pregnant in December. When I told R he was very cruel and told me to have an abortion because he said so and that he wasn't ready for kids, that he wouldn't financially support the child and that the only money he would give is to pay for an abortion (mind you I am financially independent- so wouldn't need his financial assistance). We were using contraception which obviously failed. I had been unsure if I had actually wanted more children as I have a pre-schooler from a previous relationship who I parent 100% of the time. I subsequently miscarried and I have been feeling very sad hurt and angry. From the miscarriage, I had an ultrasound and some tests ran and have been diagnosed with PCOS which I have been told that miscarriages are common. Whenever I see pregnant women I find myself staring at their bellies as I would in fact like more children. I'm angry that the contraception failed and that I am in this position but glad to know that i do in fact want more children. I'm angry at how R has treated and spoken to me. He doesn't care about the miscarriage and has cut me out of his life. I feel like I am going through this alone. I did try and talk to R recently which quickly turned into a hostile conversation. I'm angry at how quick he has moved on to seeing other people and how I am left to deal with the 'mess'. I'm angry at myself that the miscarriage occurred- I feel like a failure and I know that this is irrational. I'm angry that I have not gotten over it. I'm angry that R doesn't have to go through what I am going through. I mostly feel alone with no family close by and a few friends that I would feel comfortable sharing this with. I understand that these feelings are not outside of the norm but how do I move past the anger associated with R and the miscarriage?