You should not be worried. What you are suffering from is a bad case of "internetitis"; reading too much about symptoms of HIV from the internet.
What you engaged in was not a risk for transmission of HIV. Unprotected oral sex carries an EXTREMELY low risk; think along the lines of .5 to 1 per 10,000 exposures with a source KNOWN to carry the virus. Your risk would be less since you cannot confirm your partners status.
Neither kissing nor frottage (rubbing of sexual organs) are considered risky behavior of HIV transmission.
Some of the symptoms you describe (specifically the white tongue) are issues that are ONLY seen at the end of the disease; i.e., when HIV has moved on to AIDS. Oral candida (i.e., "thrush") is an very painful symptom that involves more than just a white tongue. In an untreated individual, it takes about 10 years after transmission for this to develop.
In other words, everyone has bumps on the back of their tongue as well as a tongue looking a bit white. Your worries over all of this have triggered some diarrhea and dry mouth which are very common symptoms of anxiety.
It would likely benefit you to consider some HIV screening; NOT because you need it for any reason of risk but rather to help you get over this fear when you get your nice big NEGATIVE test result.
Good luck!
Gail