Help ? Please

Hey guys .. i am new to this site and I only had a Flu shot and that was 7.5 years ago and a hepitatis vaccine 3.5 years ago and 1 year after my hepitatis vaccine ... i developed Bad breath ... and this all started one day when suddenly my bowel movements dropped from me going to the bathroom 2-3 times a day to maybe once a day , I have had Ct scan's , ultrasound , urine , blood tests , X-ray , Upper GI Barium tests ... all results are normal ... and the doctors told me maybe its in my head ... i am certainly sure its not in my head since i know i hhave developed bad breath and a unnoticable amount of body odour and lower abdominal pain ... what should i do ? help !?!?