Hello, sorry you find yourself on here, but you did the right thing in going to your doctor, waiting is by far the worse part. The clinic will be a slick operation, can you take someone with you for company as there may be a lot of hanging around? 

And don't forget the odds are on you side...8/9 out of 10 lumps are innocent and your young, so, in the meantime stay off dr google ( he really is very evil) and keep as busy as you can, the time will fly by...keep us posted? And good luck xxxx