Welcome to the HIV forum. The identical questions have been asked and answered innumerable times, so my replies are brief (see the information in the Disclaimer message).
You describe a female partner who almost certainly does not have HIV. And when a woman has HIV, the chance of transmission by unprotected vaginal sex averages once for ever 2,000 episodes of intercourse. Symptoms never are useful indicators of new HIV infection, and it sounds like you juust caught a cold. Finally, HIV tests more than 6 weeks after the last possible exposure are always reliable, so your result at 3 months proves you were not infected. The same tests, with the same reliability, are used world wide.
Of course see a doctor or clinic if your symptoms persist or you remain concerned about them, but the test result proves they are not due to HIV. From the viewpoints of transmission risk and symptoms, you didn't need HIV testing at all. But you did it, and the result is reliable. You can move on with no fears at all about HIV from these events.
Regards-- HHH, MD
Another thing: are there any types of disease that can hide any trace of HIV? just curious...
No, none -- with the possible exceptions of terminal cancer and other life threatening conditions.
can you rank based on reliability at a certain time after possible hiv exposure the different HIV tests????
The time to reliably negative test results has been discussed on this forum innumerable times. Use the search function and try terms like "seroconversion", "window period", or "time to positive", with or without the various test types. Or search Google with similar terms.