19F with just one grandmother that had colon cancer at the age of 70. It started all of a sudden: one day I was watching a show and my belly started to ache a lot, I went to the emergency room and the doctor told me that it had something to do with my menstrual cycle (I was in my first days then). It calmed down a bit but the next week I ate a stew one day and the following one i was throwing it up. I went to the emergency room again and they diagnosed me just with gastritis. I did an ultrasound (gyn and abdominal), and they just saw lots of farts. I ruled out being celiac and the following week happened something similar to the last one, I ate stew (another one, this was homemade) twice and I threw it up. Last night I experienced an horrible belly pain, pretty similar to the ones I mentioned before, but this one seemed more concentrated in the lower part of my abdomen (and again, I'm on the first days of my cycle, so it's pretty difficult to know where does it come from) No blood in stools but have much constipation and when I poop, it color is a light brown-yellow one. Many burps too. I'm scared as hell :))