Hello, I'm 22 y/o, height 165, weight 65 kg. I was travelling home for about 30 hours in a minibus and now have a horrible stomach pain that keeps me from sleep even. It has happened once before 2 years ago and it went away in about 4 days. Please help, I can't stand it, its so awfully painful. It hurts in a lower part of a belly. Thank you.