Hello doctor, when should i take 4th gen combo test 84 days or 90 days? i already taken 43&63days came negative.then i have sore throat&nasal congestion more than 70 days. should i take all std tests? 90 days correct time period?

Your HIV tests already are conclusive; never need to have 4th gen (combo) tests later than 6 weeks, regardless of symptoms. Other STD test timing: gonorrhea/chlamydia (urine) any time after 3-4 days. (Do not wait longer than 30 days, which risks missing infection that clears up without treatment, before testing.) Syphilis blood tests conclusive after 6-12 wk, depending on particular test.

You do not need to test for HIV any more. Your symptoms are due to something else. It is not feasible to provide a meaningful opinion without examining you and you should consult your doctor.