what is wrong with me, i am kinda scared, am i sick?!

okay.. today I pooped like 2 times, but i pooped kind of a lot for me each time and it was not diarrhea. afterwards I ate half a burrito and then took a little nap because I had a head ache. then i woke up and took an advil for my head ache. (note it was a few hours later so my stomach was empty) then I started to get a little but of a stomach gnawing feeling from what i am assuming is from the advil. so i ate a little bit of popcorn and that helped a lot. but then that same gnawing feeling went lower and started to turn into an extremely bad cramp that kept getting lower in my abdomen. this went on for about an hour then i started to feel hungry so i ate a piece of pizza. my stomach feels fine for the most part but after that pizza, i started to get gas now i have a pain on my right side. and i feel kind of hungry again..

am i sick or was this from the advil? I know yahoo answers isnt a doctor. but i have a fear of becoming sick and i just need a little positive reassurance that i am not.

i do have a problem with ulcers and digestive problems as well...

please tell me this is not a viral infection???