I have almost this same exact thing. Im 14. I have had this before when i was about 5. I had it until i was 9 or 10. We went to the doctors alot. Almost every week. Now its back. I gets this sick feeling like my mouth gets watery and i burp alot. I recently was diagonsite with FOS (full of sh*t) sorry but thats what i was diagonsite with. that was 2 months ago. Now i have the same stomach ache i had when i was 5. I really wish the doctors coukd find out what is wrong with me. i get this every night after supper. It doesnt go away until i get up and walk around. Every doctor i go to says im perfectly fine. If anyone has anything like this please help. I dont know what to do anymore.-Kendall