Emotional... Decisions... I cant do this😢

Please dont judge. So my husband and I have been having major problems for over a year now. He left me and moved in with a female last May. Came back in September. Stupid me. After that we continued having lots of problems. I had began talking to a guy that i went to high school with and we hit it off. Everything was going great. My husband still lived in the home but we werent living as a couple. Well in January 2017 I found out I was pregnant. Its my high school crushes child. Well everything has been ok up until this week. I havent talked to him since Tuesday. I message him about my ultrasound today and i get a text back telling me that his other kids mom has demanded they be back together or she will be taking the kids and moving states. He has now suggested (after we spoke about this and how its sin) that i have an abortion. He has said he cant be there for me through this. So now I dont have my husband, im pregnant with baby #6 by a "man" who said he would be there but now wont be. A part of my wishes i would miscarry but then a part of me feels bad because this baby didnt ask to be conceived. Ladies I need some support. No one knows Im pregnant except him.