If you can, call your doc and see if you can get in faster. There's nothing more frustrating then having the symptoms go away the night before your appt.
AJ
There are STD's that cause painless sores, although I don't know if this is what you are describing. It would be impossible to try and figure what it is over the internet. You are doing the best thing you can do by going to see the doctor. The biggest risk factor for it being a sexually transmitted disease would be if you had recent unprotected sex especially within the last month.
~bk