Husband doesn’t want baby #2

I am 4wks pregnant with baby #2 and my husband wants me to terminate. I don’t know what to do. Our son is 5mos and I didn’t get my period back after having him, and we only had sex THREE TIMES—and bam, bfp. Baby #2 clearly wasn’t planned, and we always said we were “one and done”. My husband was supposed to have a vasectomy but never got around to turning in the paperwork. Financially, it will be a little tight with baby #2 but not horrible. We’ve been married for 10yrs and are really happy and stable but I feel like if I decide to keep the baby, what if it ruins us?? I don’t know what to do 😩😞😞😞😞