You never thought it could happen to you, but now it has: you wake up and something doesn’t feel right…down there. It could be an itching or a burning sensation that won’t quit; it could be angry red bumps or a strange smell. In any case, you haven’t felt anything like this before and you don’t know what to do. Your first thought might be to go to the ER — but this might not help. STD testing procedures are a necessary part of sex — whether it be a casual hookup or a long-term relationship, it’s important to take …