Hi I Am Concerned About A STD. I Went To

Hi I am concerned about a STD. I went to a titty bar last week. I got a very short lap dance as in maybe 20 seconds long about 5 or 6 times. The dancer had on underwear. I was fully clothed pants and underwear. I only touched part of her butt higher up. I had to urinate multiple times and I washed my hands multiple times but not every time. I masterbaited when I got to the hotel. The next morning I found a bump on the side of my scrotum by my leg. Just a single bump. At first I thought it was a pimple or an ingrown hair so I tried to pop it. I saw clear liquid on my finger and mabye a tiny amount of white pus but I couldn't tell on the pussy because it was dark in the room. It has been a couple days since but I am worried it is herpes. Can I break out with herpes that fast and only have one spot? And I have tried popping it more than once now and just clear liquid comes out. Can this possibly be herpes?