What Causes Difficulty In Passing Stool And Nausea After Undergoing Prolapse Surgery?

Hello please help. I had total prolapse surgery 4mths ago and ive been having problems going #2 since. I woke up middle of the night early morning Mon. feeling nausea and had diarrea but after i went i continued with my day nomore bowel movements or ill feelings. Then Weds night late at night i began the pain by my naval on my rightside and it has not subsided it kinda feels burny now too. I am not running a temp nor do i feel sick but i have been freezing for a few days no matter what i do which is really not like me ever since my total hysterectomy 2and a half yrs ago. I dont know if my back too since my back been hurting since surgery but its spreading to a larger area on the right. I did have a bowel movement today it was like clay and that was the first since mon morn. I havent really had an appetite all week. It seems like at night time it when im layin in bed its worse. Help