Unplanned Pregnancy and my husband dissapointment

Well i found out yesterday that i was pregnant. I was thrilled even though it wasnt expected, and couldnt wait to tell my husband, we've been married just over 5 years and we have 2 boys already. I'm currently a sahm but of course after finding out about my little bean Im happy, even excited abput working again. While I thought that my husban would be happy, he's the opposite, and is treating me horribly, ive been so depressed ever since i told him. He's saying its all my fault and this is the worst timing for me to fuck up. I know he's scared and has every right to be, but i hate being treated this way. At one point he mentioned that he loved our other children and me but not this baby, and that broke me. I dont know what to do, he did this with our first also and i felt so alone my entire pregnancy, and i dont want that again. Im just so scared to leave. Sorry for the long post, jusy needed to vent to someone. I feel so alone and lost, i love him so much but i cant do this again.

Update: I started packing mine and the kids things and was talking to my mom about moving in with her for a bit, he got really upset and started crying and begging me not to. I told him he can either be loving and supportive or I'm leaving, period. He has made a complete turn around, he's been doing more around the house, we had our first ultrasound today and he was happy to see babies heart beat and has been throwing around baby names. I'm so happy he came around!