What is this??

okay, i dont think im pregnant, have taken numerous tests all neg. Havent had since nov. i HAVE gotten every period since then, just lighter since starting the BC in oct. Oct's period was heavier than they are now, which i think is normal for being on BC. Am on BC and switched mid nov. I had my period last week, and i was extremely bloated. I thouight it was b/c i was on my period. Well i still have it but its gone down. I get cramps, inconsistantly and not too bad, just annoying. When i press on my stomach both above and bellow my belly on it hurts and feels hard. when im laying flat on my back and press on my stomach, it just hurts around my belly on, and is hard. i also burp after, like theres air. I dont think im pregnant, or could i be. I dont FEEL pregnant by any means. I am not urinating more, havent gained weight, dont have morning sickness. I go to the doc wed. I also have been pooping more often, like everyday,which iss unusual for me. Thanks for your input