Your symptom alone does not suggest that you have HIV. In fact, many actually infected people remain totally asymptomatic, therefore symptoms are often confusing and misleading when we talk about HIV
You have been involved with a man of unknown health status and your exposure carries the risk HIV transmission.
In order to rule it out, a simple and quick test will provide you peace of mind and relief. If your last exposure is older than 6 weeks, you may go for the test immediately, collect your conclusive report and move on with your life.
Next time, never ever unprotected with anyone, outside your mutually committed long term monogamous relationship