sara i had the same thing on my leg went to a dermtoligst he said it was precancerous and he put liqiuid nitrogen on it to freeze it he said it would fall off in 7-to 10 days its been 12 days and its still there so i guess i will have to return and have it cut out and biopsyed you should really have a dermotoligist look at it !
I have almost the same exact symptoms have you had any luck finding out what the problem is?