colon pain

what is a good remedy for colon pain associated with constipation? My doc still wants me to do some colloidal enemas and Probiotics Enema s to get rid of an infection but the constipation is not letting up. The only way I have a good bowel movement is of I take milk of magnesia and prunes but i dont like having to rely on things like that and want my system to function properly on its own. Also, I will try and go see a colorectal doctor and ask about the pain to make certain its nothing severe. The pain usually begins around the time of a bowel movement and one doc said that sounds like constipation. I took citrucell and that helped a lot but, again, I dont like relying on things. I want to be able to have a healthy digestive system. I am on a modified gaps diet right now also.