I was tested in August and again in September and negative across the board. Yesterday i noticed a 1mm bump at the area where the foreskin meets the head (i am circumsized). Well i thought it was a pimple so i was able to pop it when stretching the skin and a small amount of white pus came out. Now it seems to be a very small open sore with clear fluid. Could it be a pimple that i popped and now is healing or is this syphilis??