Oral, anal or vaginal?
Find a real doc because yours is a quack. Which country do you live in?
You don't have any medical training and don't know what lymph feels like so shouldn't poke it then think you are diagnosing.
The testing guidelines have been 3 months, maximum, for many years now. I don't know why your doctor is using testing recommendations that are about 10 years out of date, but unfortunately that is the case.
Your 4th generation DUO test would have been 100% conclusive when taken any time at 42 days or beyond. There is no reason to re-test, and whatever is causing your swollen lymph nodes has NOTHING to do with HIV. You do not have HIV.