active 15 yr old male 139 lbs. often fatigued after eating. GTT was 193 after 1 hr and 186 after 2 hrs. all tests have come back normal. ...i.e. 3 month sugar avg, thyroid, sugar levls, cbc, cortisol.......any ideas what to look for.

this has been going on for 3 months started after a cold/virus