Ugh, this sounds very uncomfortable. I always head to the bathroom when I'm having such issues. Something about giving it a go on the toilet helps me. the position curls your stomach which is soothing (the fetal position when you have abdominal pain can give a bit of relief), I try to drink small sips of water (nothing with sugar in it as that can make it worse), eat a tums, etc. If it gets severe, then it's time to give a doctor a call.
Hope you feel better soon. Let us know, okay?!