ok, i m a 18 year old boy n i had circumcised at 17.
well, it is a pain in the neck, coz the erection will makes u painful.
Firstly, take the pain reliever pescribed by ur doctor. Erection at morning time is a natural body action, therefore, wat u need to do is to get down from the bed n walk around, tis will makes ur body to concentrate on walking bt nt erecting. never think about sex tat will stimulate erection n no mastubration during tis period.
mayb tis symptoms will stay for one or two weeks(mine is 2 weeks), then u will back to normal.