Protected sex is not a risk for HIV. You had no risk for HIV and did not require testing. But since you did get them done, you can see they were negative because you had no risk in the first place.
Your symptoms have nothing to do with this which is why I did not comment on that. Symptoms are never used to determine HIV. Only risk (which yours is zero) and test results (which yours are negative because you had zero risk) matter when talking about HIV.