Should I be a sahm or go back to work??

Does anyone ever regret quitting their job? I'm so torn I love being here for my son he'll be 5 months soon. I got 22 weeks of maternity leave so I have to decide if I'm going back asap. We will be very tight each month on one income as I make more than my husband but it can be done. Daycare is $190 a week here which is crazy. My son is also kind of difficult in that he has to nurse to sleep even for naps and I can rarely put him down for 10 mins without him crying. So I can't imagine what daycare would do to him. But part of me really wants a break some days and that's selfish I suppose. Any tips or opinions to help decide?