Just got gb3

I just started taking this product from endomet labs. I had no stomach cramping or anything, took 1 for breakfast , 1 at lunch, then I tried 2 at dinner, a couple hours after dinner, I started to feel this awkward pain in my rectum/colon, I dunno where exactly but it wasnt extreme, but I did feel some pressure up in there for a a couple hours. Just wondering if anyone knows what may have caused this.