have they done a cat scan or an mri? anything like that? i went through the same problems.. nothing was or is helping. fianlly they did a cat scan with a pelvic contrast and they found a tumor in my rectus legion muscle of my adominal wall
and also doagnosed me with endometriosis. it didnt come with my period all the time either. when i got my period the first couple of days was and still is very unbearable..

i have endometriosis and my pain is very similar to urs it generally starts in my abdomin then moves to my uetrus then moves to my lower back it varius as to its persistancy sometimes it goes away after a min or two and then returns 10 mins later and sometimes it can last all day the vomiting also sounds familiar i lost 10 pounds in two weeks ... there r tests they can do to see it is endo but the best one is a labrascopy . they make u two very small cuts one in ur belly button and one by ur uetrus they stick a camera in one and a laser in the other so if they find any scar tissue they can easily remove it . as far as treatments go their r 3 of them that i know of .. they generally start u out on birth control which helps slow the growth of endo . when they put u on the pill they will usually have u take it continuously for three months then on the third month u wil take the row of water pills which will allow u to have a period for that week u can also just not have a period it depends on what u want and what ur doc says is best it may take soem time to find the right pill for u aswell because everyones body is diff . the second way is geting hormone shots wich will throw u into a chemical menopause causing u to no have ur peiod as well and the final treatment is the labrascopy as well because they can remove the scar tissue that comes with endo ... u really just need to go to a really good OBGYN because endo is hard to diagnosethey miss diagnosed me for 6 months after numerous hours of testing i finally got a good doc that referred me to an OB and some docs know nothing about it so they dont even think to check u for that .. good luck and keep ur head held high

Possible Gallbladder. Get a ultrasound of the gallbladder. Also other causes,esophageal Reflux, IBS, Peptic Ulcer, kidney stone OV cyst or intestional obstruction. Best screening for all the above is a CT with and without contrast.