id stick to the racetrack when it comes to giving out odds.take the test and then you will know. simple
HIV transmission is not a game of numbers and statistics.
It is true, chances of getting the infection as a result of an isolated single event of unprotected sex are not high, and there are many odds in your favour.
However having said that, the risk associated with that single event is not zero either since status of the partner is not known. The best and the only way to lay your worries to rest permanently is, to get yourself tested after 3 months of the exposure, get a conclusive result and move on with your life
Your symptoms do not look like ARS, however symtoms do not mean much.