Unexpected pregnancy

So I’m a mess right now ! I just had my baby girl 4 months ago she’s perfect and I have a 5 year old boy ❤️ my SO and I where doing great but we had said she was our last and no interest in having more so I got on BC well I missed my period this month I never do so I freaked out now I’m 10 days late I’ve taken a few pregnancy test and first they where vvvfaint but they are getting darker so I told him and he’s very upset he says we are in no position to have another baby especially so close in age I totally understand and I’m not ready to have another but I can’t have an abortion even if I would have the courage to do it I feel like I would regret it the rest of my life he said he can’t support me if I decide to keep it and he won’t help me out idk if I can do this by myself 3 keeps I would bearly make enough make it and I know I would struggle I have no family around except his I’m sure they would help me but I’m so confused right now please only positive advice I already feel like crap 😔😪