This is an embarrassing, but true and serious question: I recently dried to perform auto-fellacio, and basically spent an extended period of time trying to fit my head in between my legs. Needless to say, my back is killing me today from being so violently forceful yesterday. It feels like there's bruising right on the spine, and I have a bit of tingling in between my shoulder blades. I'm really concerned. I don't want back problems, especially since I'm quite young. I lay with some ice packs on my spine for a while today, but am going to try some heat right now. What should I do?