I have been having the same symptoms the last few months! So frustrating! Did you ever find out why it was happening to you? Did it ever stop??
You need to contact your doctor or a medical professional and run tests to make sure nothing is wrong with your body chemistries, or like sarabeth said, galbladder. It could be nothing, but better safe than sorry!
YOU MIGHT WANT TO GET YOUR GALBLADDER CHECKED I WAS VERY SICK FOR MONTHS AND ONE DAY I HAD A KINEDY STONE AND I WENT TO THE ER AND I WAS ATTIMTED WHEN THEY WERE RUNING TEST THEY FOUND I HAD GAL-STONES NEXT THINK I KNOW I HAD IT TAKEN OUT!! I STILL HAVE PROUBLEMS BUT NOT AS BAD!!
LEAVE ME A NOTE AND I WILL TELL YOU MORE ABOUT THE TEST AND MEDS AND THE SURGEY IF YOU WANT!!
HOPE THIS HELPS!!!