extreme back pain

I'm a CNA and my back has been hurting so badly lately that when I get home from work I can literally barely move. My entire body gets numb. No exaggeration. It usually feels somewhat better by the time I get up and then it happens all over again. I'm not sure what I did or if what I did was work related but the only way to even slightly relieve some of the pain is by constantly cracking my back otherwise it feels stuck and I feel sharp pains. Can anyone give me any recommendations on what else I can do to relieve the pain? I take so much ibuprofen or Tylenol daily that I'm afraid I'll give myself a GI bleed. Help!