Please no judgment, I’m so scared

I have a 15 month old and his father and I are off and on. He is not stable and does not help out with our son AT ALL. He’s struggled with addictions and seems to finally be getting it together there but he lives with family still and has no job. We had sex one time within the past two months and I just found out today that I am pregnant. I am so terrified. I’ve never thought about abortion before, I’ve been so against it until today. I have help financially from family right now but as soon as they find out I’m pregnant again I’m sure they’ll be done with helping out. I don’t have anyone that is actually there to help emotionally or with my son as it is. Does anyone have any kind of advise?