All i can say is get tested if u r not sure. Its possible it could be stress. See i was just diagnosed with herpes type 2 about a month ago. I have had just a bump a few seperate times & im not sure if they are outbreaks or not. So ya i advise u to get tested. As far as im aware its normal to have a temperature during an outbreak.

Yes it certainly sounds like genital herpes. I had exactly the same thing, just one single but painful ulcer (the sort of thing you would get in your mouth). I always assumed that genital herpes would mean you get loads of blisters because that's what the websites show, that's why i left it so long to get tested. i eventually went and got tested and was diagnosed with genital herpes :-( 

Luckily though since the first one i've only ever had one more outbreak approximately 9 months later. Hope that helps x