Unplanned Pregnancy In a Messy Relationships

I will try my best because this might get confusing. So my gay ex and I where planning on co-parenting together and where planning to start trying to conceive in July, so I was on all the pre pregnancy vitamins and getting prepared for a baby. Now this is where is get messed up. A year and a half ago my friend started opening up to me about problems with his marriage. They where both my friends. We ended up in similar situations in our relationships and we ended up sleeping together. I ended my relationship the same time, fast forward a year and a half, of I love you, I know my marriage is over I just want her to accept it before I leave and I want a future with you, to today On Friday we found out I was pregnant with his child and that due to major compilation with his snip, it obviously hasn't work. Now everything is out in the open I've lost a friend, I've hurt my gay ex badly, he is laying low because it didn't end the way he wanted and everyone is hurting badly. This is my first pregnancy and I hate saying I'm finding it hard to be excited and happy. He is not happy or excited because the child is his, but when it was suppose to be my gay exs he was over the moon and said he didn't want or complicated relationships taking the joy of it away from me. While he has. The reason he got the snip was his 3 kids have problems, but only the 2 kids with the wife have similar problems, so I'm not 100% sure it is down to him. The first child has autism, but things like that run on the mothers side. He never waited for the genetics to come back before getting the snip, so we don't know if it is him. He said He would love more kids but can't round the risk of more sick kids and that's why he got the snip. He has shut down from everyone including me and I need him to step up for me. I feel like giving him to the end of the first trimester to sort his shit out or I'm going to have to prepare myself do this alone.