Went to doc he told me i had herpangina due to the bumps on my soft pal it has now been a month bumps stil here one on tonsil? could this be cancer?

Doubtful: It may have not been herpangina which is caused by a viral infection. Herpangina will usually subuside with 1 to 2 weeks and usually coincides with fever and malaise. Cancer must be diagnosed by biopsy and at your age it is rare enough that i wouldn't worry too much about it. You may want to revisit the doc and have him look for other causes to your problem.