Thaks Doc. The info on this forum has helped me maintain my sanity.
From your description, you are not at significant risk for HIV, so whatever the cause of the appearance of your tongue, HIV isn't the cause.
1) That said, your description suggests coated tongue, not oral yeast infection (thrush). Even if you had thrush, it wouldn't mean HIV; it occurs in healthy, immunologically normal people--I had it myself once. Coated tongue is a nonspecific finding that occurs in many minor viral infections and other health conditions besides HIV. Many cases are unexplained and do not indicate any health risk of any kind.
2) A PCR test was not called for. Had you come to my clinic, I would have refused to do it. But if you had acquired HIV, the PCR test probably would have been positive. The proper test would be a standard antibody test a few weeks after the last potential exposure.
3) I very much doubt you have HIV. But if you remain concerned, follow up with your personal health care provider.
Regards-- HHH, MD