Root Canal and Stomach problems

Dear all,

I had tooth number 3 root canal five years ago( or number 2 because I do not have wisdom tooth yet). Before root canal I had minor stomach problem that never was annoying. A few months after root canal I have been facing stomach problems like cramps and irregular stool that makes to me serious problems that cause me can not go to my classes It has get worse and worse monthly.I tried many many ways to treat myself. A few months ago I was asking myself when this problem started? I found the only change I had in my life was having root canal in third semester of my study. And I remembered after 3rd semester I could not go to my classes normally due to my stomach cramps. Now, 2 months ago I went to dentist and she found an infection by x-ray in the tooth that had root canal. 4 days ago I treated the infection by her but one step is remained to finish. In theses four days my stomach is very very calmer than before but still have some minor problem. My bloating has come to 10 percents of before this tooth treatment. I hope I am right. Because I tried different ways and seeing no results I can not trust my current situation. I need more time to judge better. Do you have any idea?