Hiv test done. Tested negative other!

Had an unprotected oral sex with an African and protected intercourse ( doesn't know slippage of condom occured)....had several test in inbetween all were negative including western blot,hiv duo and rtpcr... till now all test are negative including 1)at 7 months - western blot and hiv duo negative.ictc combaid kit negative 2)at 8 months hiv 1 qualitative and quantitative test are negative( target not found) , hiv 2 qualitative negative. hiv p24 not detected. hiv duo negative with titre 0.16. 3) have done my cbc too .... the value after the exposure was between 12000 and 14000.But it has come down to 9700 as per latest count done in 8th month .have done my CD counts too .to my knowledge it seems to be normal. 4) issues that concern me are now swollen lymph nodes in submental submandibular region... nearly 6 to 7 tingling sensation in the above mentioned area 5) my doubts are - am I a late seroconverter. is there any protocol for testing if patient have symptoms but tested negative other