how early did you have back pain?

I'm back with my annoying questions lol. It's just that my back is KILLING ME. I mean, it's so bad, this thing has me tossing and turning, and no matter what side I lay on, it continues to ache. It's kind of driving me cuckoo. I'm not saying I'm pregnant, but I can't rule out the possibility. I don't ever have back pain. I've tried reasoning with myself saying that it might've been the rough sex i had a couple of nights ago, but I've had rougher sex with no back pain. Ever. I just want to know how early on y'all had it?