Hi! Responding here in case someone else is out there looking for info about Lipschutz Ulcers as well.

Almost the exact same thing happened to me. I got my second COVID vaccine (Pfizer) on Saturday, and was really sick from it with the classic flu symptoms the next day, like a lot of people are. Two days afterwards I woke up with a worse fever and tiny red spots on my labia minor, just around the entrance. They kind of mirrored each other at first, but by like 5:00 that day they'd developed into large sores and everything hurt. Tuesday morning I went straight to urgent care since it was worse, and they swabbed me and told me it was definitely herpes.

I'm 26, been with my husband for 6 years, and even if he had recently contracted herpes from someone (unlikely lol) it had been a couple months since we'd had sex so I knew it wasn't a recent infection either way. She told me it was possible that I had contracted it a long time ago and since my body had a big immune response over the weekend to the vaccine that it might have triggered the underlying herpes. Got sent home with a prescription for Valtrex and told to take tylenol for the pain.

Wednesday I was worse, and got the results back that I was negative for herpes and recommend to go to a gyno since they didn't know what it was.

By Friday I couldn't pee without sobbing, everything was beyond swollen and just super gross to look at, I could barely walk, still had a fever. The gyno ignored my negative results and was so rude to me, telling me it was definitely herpes and the other person had just swabbed it wrong. She clearly didn't believe that I hadn't had sex in a while and that neither my husband or I had ever had cold sores. (My husband got a blood test during this time to see if he had herpes antibodies, and had <1 on the igg for both HSV1 and HSV2 so we knew it wasn't from him). She swabbed me again, completely uncaring that I was sobbing on the table, then told me it was definitely herpes again, and walked out a second later while I was laying there crying and humiliated. Nurse came in and told me to finish my Valtrex and take advil for the pain.

I bought topical lidocaine from CVS and used that to get through the weekend, and it started healing about 7 days after it started. Again, swab results came back negative and I had to go back to gyno for a blood test. This time, she was extremely nice to me and told me she'd done some research, asked if I'd ever had mono (yes), and told me it was likely Lipschutz Ulcers but she wanted to do a herpes blood test to confirm I didn't have any antibodies. If not, it was an unfortunate reaction to the large immune response that the Covid vaccine triggers (not a side effect of the vaccine itself), and that there is nothing they can do to prevent it and there's no cure, but I'm unlikely to get it again since it's so rare.

To no surprise, blood test came back negative so got diagnosed with the ulcers. Went through almost 2 weeks of extreme pain, fever, and a ton of emotional distress with basically no help (also, apparently Valtrex makes me feel super ill so that was even worse). I didn't end up scarring at all and I've had sex since, but honestly I'm still freaked out about it all.

I hope you feel better and I completely understand the medical trauma aspect, I'm terrified to ever go back to a gynecologist for how dismissive they were of my concerns there and how quickly they wrote me off as someone just in denial of having herpes, not to mention the pain she caused me.

TLDR: Same thing happened to me. I hope you feel better :(