pharyngitis days after HIV risk

I am on a trip in a different country, and a couple nights ago I met this girl at the bar. Prostitution is huge here, but this girl wasn't a prostitute, or at least she didn't charge me anything. Anyways, she gave me oral sex with a condom on and we were pretty much just making out the entire time.
I have heard that HIV infection is low risk through kissing, but am still worried because about three-five days later I got a really bad sore throat as well as a cough and I have had a lot of phlegm.
I went to the doctor and was diagnosed with Pharyngitis, but this doctor only looked down my throat and asked my symptoms and said "you have pharyngitis, gave me a shot and antibiotics and sent me on my way. I understand that sounds sketchy but this was one of the most popular doctors offices in Thailand (where I am vacationing).
Anyways, my friend freaked me out when she told me that Pharyngitis is a symptom of HIV acute syndrome disorder or whatever its called.
Is there a test I can get or do I have to worry for 3-months before I can get the real test. Also have you heard this situation before, where someone gets Pharyngitis days after having oral sex and kissing with a girl he has no idea anything about.
Thanks!

[Teak]

You haven't had a risk and HIV is not the only cause of pharyngitis. Besides your symptoms came on to quick to be related to HIV. You don't need to test for HIV over this situation.