Get checked for all STD's and get a culture of that specific bump. Go to your local Health Department, usually they offer free STD testing. If you have insurance, see your regular physician and they should just charge you a co-pay.
thanks. do u know how much this would cost?
since it was unprotected sex, you can follow up with proper std testing. chlamydia is probably your biggest risk and that's a simple pee in a cup test .
You need to go and be seen and get this new symptom properly evaluated. It could be something completely normal that you are just now paying too much attention to or something like a wart that needs treated.
grace