You say nothing about the sort of exposure you had or about your partner making it quite difficult for me to judge just how low your risk is but following a single sexual exposure to a partner of unknown HIV status, no matter who the partner or the sex act, the risk if low and typically very, very low. Your symptoms
are in no way suggestive of HIV
. They occurred too early
to be typical of the ARS and sound like they are more likely to be due to anxiety or, at worse, a summer cold.