It could be herpes, but it could also be a lot of other things. It definitely sounds like something that you need to get checked out by a doctor, though.
If they even suspect herpes, ask that they do a type specific culture, preferably a PCR swab. Any doctor can do that, even an Urgent Care. Go as soon as you can - the longer you wait, the harder it will be to get an accurate test.
Let us know what happens.