With no pain (until you popped it), and protected sex, herpes is a bit less likely. On the other hand, a "blister" is consistent with the way a herpes outbreak would look. But typically there is more than one, and you would normally have also had a fever, swollen groin lymph nodes, etc.
It's possible your Dr tested you for HSV 1&2 or not, it seems to vary from doctor to doctor. But usually you can call in and clarify which tests were run. I'd do that before I worried too much about it. If they didn't run the tests, now would be as good a time as any to check your status.
Ive had unprotected sex before [i was raped] but i have been tested, havent had sex for about 15 months..and ive also had a bump behind my ear & 2 in my neck that have not gone away... and its been about 8 months or so
Wont all Herpes show up in ur blood? u dont HAVE to test it from the "outbreak" [blisters] do you???
Herpes, being the virus, doesn't actually show up in your blood. What does show up is the antibodies that you produce to being infected by Herpes.
So yes, you can test without an outbreak, and as long as sufficient time has passed (>3 months) the test will be pretty accurate.