I was sitting on the floor leaning against the wall watching a movie on my laptop for quite a while maybe about 3 to 4 hours, when I finally got up I started experiencing pain on my abdominal area, it's been coming and going frequently since last night and now in the morning. It almost feels like stabbing pains on my stomach. I tried to force myself to vomit only to find yellow bile and also passing stools because of the soreness but still nothing is changing, even tried to sleep it off only to wake up with the pain still there. What can this be ?