Sigmoid colon. Problem. please suggest!

Hi, since last year i am facing issue. It is very weird but i feel & i am sure my sigmoid colon is displaced from its original position (also at start when it displaced i got slight pelvic tilt but i couldn't realize it) whenever i try to put pressure for passing stools lot of pressure is applied on uterus, also my back muscles have become weak due to this change. My diaphragm feels more spacious and my pelvic floor muscles have become weak. I did Usg of stomach everything was normal but when i started feeling i am getting back pain and my spine curve is also lost, it took lot of time to me to understand what is wrong. Worst part is apart from being too much uncomfortable i never felt any pain. Many times my stomach also feels weird. This all happened when i had person sit on my thigh when my thigh was paining, i assume some muscle got pulled which also pulled my sigmoid from its place, it has also affected my leg muscles. I need suggestion and solution to this problem. Please suggest