Hi, I Wonder If There Is A Name For The

Hi,
I wonder if there is a name for the symptoms I am experiencing. Every so often, say every couple of months, my digestive tract becomes constipated to the point that I have to either take probiotics every couple of hours and drink a lot of water or vegetable broth to help it become active again; or I take Tums and antacids to work on the heartburn that accompany these episodes, and hope that I will eventually have a bowel movement. During these times, my abdomen becomes harder and sometimes I have a lot of abdominal pain and nausea.
I am looking at the specific carbohydrate diet, wondering if it could help my system. I have been constipated since I was young (as in high school).
Thank you for any help that you can give me.