Hi guys,i went to GL for a CBJ,was my first time.It was only a CBJ at one of the houses,the legal one. That was my only sexual encounter,i went for a HIV test 165 days after exposure,that is like 5 months odd. It was negative.

Do i need to test at 180 days? Some people say you must as some get detected only at 180 days,whereas some say you none need. Im quite confused.

Basically my questions are:

1.Do i need to test at 180 days?
2.Why do some people only get detected at 180 days? Is it cos they have a better immune system or smth?
3.The house i went to,there were only 2 girls,is it a concern?
4.Recently been having some pain on penis,could it be due to any STD? Ive been tested negative for all STDs though.

Thanks alot guys.Really appreciate your help