I'm a 19 year old female. I'm worried because the past 4 days I've been feeling nauseated, my stomach keeps growling (but I'm not hungry) I also feel pressure in between my ribs, I'll start having cramping in my lower abdomen and then have to go to the bathroom with diarrhea, my eyes have been feeling weird and kind of sensitive to light, I'll feel like I have to vomit and it will just be a burp. I thought it was gas so I took Zantac and it didn't help at all. Slight headaches, loss of breath, and also slight dizziness. I don't know what is going on. I feel very tired also. I have no clue what could be going on. Could it be pregnancy? My periods have never really been normal. One cycle it will last 3-4 days, and another cycle will last 5-7 and I never really no when to expect it. I just recently had my period November 29, it was only 3 days long but normal bleeding. I also had bad cramping the first day. I NEED HELP! Does anybody have any thoughts on what could be wrong?