Pain still unknown cause

Hi ive been having pain for over 6 months now, it first started after i went to a football match on a cold day, i had gotten a runny nose and started to feel abdominal pain, i had eaten two hot dogs and a pie on that day and wonder if it could be a bacterial infection, so i went to the doctors and he prescribed me antibitiotics which didnt do anything since then ive had a endoscopy bout 5 months ago, ultrasound, ct scan and numerous blood tests all done a while ago 4-5 months ago but nothing was found and one day i ended up in hospital for 3 days and tested for pancreaitis but since it was on the lower end of the scale they said it couldnt be that and just let me go with a few painkillers, i really need a answer as it has been controlling my life, i had to quit school and im on sick for work, ive tried to go out and back but the pain is just too much to handle at times, ive been to a psychologist and she has said she thinks its physical and not stress or anything, the pain is a burning sensation and i get bloating and fatigue

i was wondering if you had any ideas