It may sound weird but is it possible a little tmi sorry?

ok for a little while i would get this dull pain on my upper left side of my stomach . according to pictures of digestive symptoms it would be my colon the pain has now moved to my lower left side of my abdomen it is the same exact dull pain i was feeling on the upper left side , also according to where i get the pain and pictures of digestive systems it would still be my colon now my question is this sometimes i get this pain it sort of feels as if something is pulling inside my l c , it only happens on my left side and on the left side down there is where your rectum is , could it be that i am feeling pain from my rectum . i have gone to a gyn and the gyn said that my reproductive system is completely fine i explained the pain to him he thought it might of been fibroids and did a sonogram inside and the results came back clean and with nothing odd , as well as blood tests , i went to my regular primary care physician and she did a full sonogram because she thought it may have been something else and she also could not find anything wrong . she said it might be the food i am eating , i dont eat the healthiest food. so could it just be my colon giving me this pulling feeling i mean it would make sense cause if it was a bit swollen the ending of the colon is behing the l c so might be that i am feeling , any advise , thanks