Is anyone else out there

Worried about being able to financially support your children? So here's my situation. I live with my boyfriend and he has a 10 yo who lives with us 50% of the time and we have a 2 yo together and I just found out I'm pregnant with a third child. He makes around 45,000 a year and I don't make much at my part time job. He hasn't been too excited about the new baby and most of it is because he's deathly afraid he won't be able to support us all. I don't know what to do but all of this has me really bummed out and wanting to possibly consider alternative options for this baby which I never wanted to even think about. I always knew I wanted a second child and my clock was ticking I felt like but now I'm so scared and wondering if I made the right choice not to wait. I just really need some support right now and to know we can do this and we'll be OK.