Burning sensation + HIV

Hey all,

I’ve been dealing with a weird burning sensation under my left armpit for the past few days and it’s kind of freaking me out.

For context, I had a potential HIV exposure in the past, took PEP as prescribed, and then did a 4th gen lab test at 6 months — it came back negative. From everything I’ve read, that should be conclusive, but my brain keeps going back to “what if.”

Now this burning feeling started recently. There’s no obvious rash or lump that I can tell, just this uncomfortable burning sensation in that one spot since 1 week. Of course, Google is not helping and now I’m anxious it could be something serious.

Has anyone experienced something like this? Could it just be irritation or nerve-related? Or am I overthinking this because of my past scare?

Would really appreciate any insight or similar experiences.

Thanks