What Causes Pain, Bloating And Tiredness After Eating?

Hi



I am a 26 year old female. I have been experiencing, for almost two years extreme pain and bloating immediatley after eating. I also experience extreme tiredness to the extent I am falling asleep at work as I feel drowsy and struggle to keep my eyes focused. I also suffer from nasua and heartburn/indegestion. I haved tested negative for anemia, cealliac and thyroid imbalance. Could you please suggest from my symptoms what this could possibly be? I dont eat any of the folowing foods as they same to make it worst - bread, chocolate, coffee soup, all dairy. I have also tried Rennie tablets and peppermint tablets (colpremin & buscopan) to no avail. Are there any tests I could have to eliminate any problems that I could suggest to my doctor as they have not been very supportive or even suggeste or prescribed medicine or diets. any help would be much appreciated.

thanks,

N