Single mother again

So I have 2 boys 2 different fathers and both relationships didn’t work out. My kids are now 10 & 8. For the last 2 years I’ve been struggling with bacteria vaginosis which made it hard to conceive when I was with someone. We are now separated but I just recently found out I am pregnant from a one night stand (I don’t even speak nor know the guy personally). I didn’t think I would be able to conceive. And now I’ll be 5 weeks next week. I always wanted a 3rd child but not like this where I’d be a single mother again. But having an abortion worries me like will I able to get pregnant again if I go through with it or do I raise this child alone. I need some opinions and advice