Extreme pain!!!

I was driving then pain in my butt and anus area. Within 5 minutes pain all threw out down there and lower stomach and lower back pains. Constant can barely walk. Unable to poop or pee normal. Urine is very cloudy. Feels like extreme pressure in lower stomach area. Nauseted. Been having a period every two weeks for about 2 months now, before that didn't have a period for 8 months!! Not pregnant clean from STDS. Any ideas.