i have been having extremely bad pain in the lower part of my stomach underneath my belly botton cramps but horrible cramps its been 4 days in a row at night and morning is when it gets horrible , so i went to the hospital and the ran blood test on me amd the urine test it came out positive of pregnancy , but once they did the ultra sound they did n out find anything there so they told me i was not pregnant that it was just a bladder infection or urine infection but ive had urine infections before and what i feel is nothing how i felt when i had the urine infeccctiom im not sure if its my apendex that needs to be removed ?or my kidney ?