So sir. No further needs of HIV test again .if lymph nodes changes are there day by day and persistent. Can these 9 week ag/ab combo HIV test and DNA test is conclusive? Why many says for 3 months sir? These all lymph nodes occur after 5th week of colonoscopy which I surely felt was not sterlised and something infection going wrong in my body. Lymph nodes in neck are less than 1 cm.in groin and back of neck also. But 4 combo test neg. Till 9 week. Very confused and tensed.