I had anal sex , now I have lower back pain , lower abdominal pain , muscle fatigue, constipation . I went to emergency they did some blood tests, everything was fine, looked like I may have an infection, so am on antibiotics, I haven t had a bowel movement in 5 days. I have occassional shooting pains down my leg that stems from a nerve in my buttocks....I have taken a pill called dulux to see if I can have a bowel movement...nothing yet....