These sound like small cysts that are
commonCommon cold on the penis. They're normal and don't mean anything. They were probably there before but you only noticed them now because you were worried. The tingling is from worry for sure. You are right that herpes doesn't last 6 months.
Bottom line: see a skin doctor or STD specialist who can confirm this, and then just forget about the spots.
Best.
Dr. Rockoff