If you still had some meds, you should try tapering off rather than stopping cold turkey as the expression goes. Or try to get half month refills or something. Some you're on are not good to just stop.

If you're responsible for the car, then sell the thing if the bum won't get back to work! Tough love! Okay maybe not, just saying look at other options, and try to take care of yourself, and not let him bully you too much.

I would take your friends' reluctance to listen as a sign you have been down this path too many times. You describe your marriage as sometimes good sometimes abusive? Really I don't think the two go together, it's one or the other. If it's abusive, it's not good. If it's good, it's not abusive and you you don't have to give up your meds.