I'm surprised, if he makes $3800 a month, that he'd only have to pay that much. I know different states have different formulas, but that's less than 20% of his income - seems pretty paltry.
Nonetheless - it seems clear that you will need to find an income, and find a way to work while still being able to give your son the attention and help he needs. Also, it may well benefit you to file for child support while you still don't have an income. For now, if he's paying the bills, I'd go along; but start planning AS IF he's going to flake on you, because he very well may.
