How to get rid of majorly painful stomach pain? HELP!?

Okay, so I woke up with morning around eight and I had a small pain in my lower right abdomen and it wouldn't go away. An hour or so went by and it didn't go away. I took some "Tums" and there was no help from that. An hour ago, I had aome crackers and toast with a glass of water. It felt a little better. About thirty minutes ago, I was laying down and I felt fine. I stood up and I blacked out for twenty minutes. I have a heating pad on right now but it is like, a major pain and it doesn't seem to get better. I am not on my period and I don't know what it is. Is there any ideas of how to get rid of it? Please help, I'm dying for relief! Its second worst pain I've had since I had my appendix removed. So please help!