I started my period Saturday. Since Saturday I ve had stomach issues and now it s Wednesday and I m on the tale end of my period now. This involves excessive gas and stomach pains. This has happened several times now while I m on my period in my 40 s. I am burping a lot, which helps, but it comes back almost immediately. The pains are dull, almost like extreme hunger pains, but I m not hungry. More bloated with gas. I do have diarrhea. And since the holidays, I ve been drinking more than I should. These pains are in my upper abdomen not lower.