BACK HURTS! NEED ADVICE (FTM)

alright, i was having some back pain (pretty uncomfortable. I'm trying to save my 'extremely painful' for when the time actually comes) so i decided to lay on the couch. It kept on so i decided to take a nap. I'm up from a 4 hour nap and immediately it is hurting again. It's dull for the most part but it really is starting to get uncomfortable here and there. I took a tylenol 500mg earlier and it didn't seem to help, which is why i took the nap. most of the time i can handle the pain pretty well (it's just a dull ache) but every now and then it gets pretty intense im not gonna lie. my stomach doesnt seem to be tensing up with it, i dont think? but my belly is so stretched out all the time i can't hardly tell. It kind of feels like the bad pains you get when you've got an upset stomach, but I've already tried to go #2 and there's nothing there. Please someone shed some light.