Your symptoms really do not sound like early HIV (ARS). There is much more to this syndrome than muscle aches. Findings include rash, fevers, muscle aches and much more. Multiple partners or not, your partner is very unlikely to have HIV and you are very unlikely to have gotten HIV from a single sexual encounter. If you are concerned, go on and get an HIV test about a week after the onset of your flu-like illness. If your symptoms were due to HIV (which I am confident they are not) the test would be positive at this time.
You have a cold. I hope it gets better. EWH
I appreciate your help and the quick response.