3 days ago i noticed a rather large red p***y bump on the undershaft of my penis. It alarmed me. When i looked closer i saw a hair growing into the bump. I pulled the hair out with tweezers and the bump began bleeding and oozing puss. Now it just looks like a blister. It has been 3 days and is still very red and very scary looking. I have no other red marks and i dont have any pain in urination, no headaches, or any other clinical signs that would suggest its herpes. However i did have unprotected sex 2 weeks ago. I have kept it clean with hydrogen peroxide and soap. This morning i woke up with an errection and it looks even worse because there is now a red ring around the blister which looks like the skin stretched or got irritated from the errection.

Help?