Just found out I’m pregnant

I’ve just found out yesterday that I’m pregnant, it’s been a massive shock as I was on birth control I already have an 18 month old little boy I’m not with his dad but we have been working through things to get back together.. I told him I was pregnant and he has told me to have an abortion. I feel like he is backing me in a corner saying I’m selfish and not thinking about him and his feelings and what he wants 😞 I really want to keep the baby due to having endometriosis and other problems I’m so stressed out