That would definitely be too late for symptoms
of primary HIV
infection (or, ARS). Besides, your 8 week
negative is, really, a pretty good indicator that you do not have HIV. So, perhaps time to stop worrying about HIV, v1905. Sure, if you remain concerned, go ahead and get a test at 3 months, but trust me, your 8 week negative is very, very, very, very unlikely to change.
If you feel that something is wrong with your body, by all means, go visit a doctor.