Last night I woke up at around 2 am and it was hot so I took of my jumper, and I was thirsty so I drank what was left of my water on my bedside table. No more than 10 seconds later, I felt pain on the right side of my upper torso. Painful, what felt like cramps even, from the right side of my stomach, to under my ribs where it was particularly painful, to under my right breast. I ended up on my knees with my head on my pillow and arms holding my head for about 30 minutes with the pain which bought tears to my eyes. Does anyone have any idea what happened?