lower abdomanal swelling and pain front and back, effecting testical, hip and leg, ill all over

im a 27 year old male having trouble finding out what is wrong, i have a swollen lower bowel on the left side from belly button to top of hip, its a constant cramp with the odd sharp pain depending on my movement or how i sit / stand, my left leg shakes and sometimes give up for a secound or two with a dead feeling, this also has effected mt left testical as it is very sensitive cant hold for too long as gives a real nasty aching sensation making me feel sick, im feeling ill all over with acid reflux and bad movement time table / discharges, concentration level comes and goes and very stressed, there is so much that changes day to day depending on foods and excersise and work load, the doctors cant find anything in blood tests and have tryed all sorts of drugs for infections and irritable bowel syndrome, pysio as they thought it was muscel related, scans and cameras every where possible but no mri scan as too much money, im now thinking of leaving my job and i cant go on for much longer in this pain, this is my last resort before i give up trying and do nothing for the rest of my days as i cant keep putting myself in pain to live and im worried something might pop as feel under pressure, i would be greatfull for any suggestions or even better a cure but i know that is slim, many thanks, who knows