What to do?

Hi everyone,

Just a little background here. My fiance and I were together for many years. We have two young children ( 2 and 3) and I am currently 12 weeks pregnant. About a week ago we broke up and I have been thinking for a few weeks now that I do not want another child. My reasons for not wanting another child are having to maintain 3 children practically on my own, (I'm still young btw mid 20s) having to travel with 3 children with not much reliable transportation and taking care of two toddlers during the day and an infant at night. Im not currently working for personal reasons however my (well i should say) ex-fiance is still currently financially supporting me and the children because he says that he will certainly be back to his family after he deals with some personal issues. Im not sure if I will want him back by then however. I WILL NOT consider an abortion and adoption to me seems like betrayal. I don't want my child growing up to think "why wasn't I good enough" "why am I the only one to get put up for adoption". I just dont know what to do. Maybe the break up is impacting my thought process because I would never say that I do not want a child that is a part of me. I am considering getting my issues resolved so that I can start work because if someone can leave you while you're pregnant with their child...why trust them to financially support you all in the long run. Someone help me please...what should I do?