Multiple hiv negative tests tell 7 months from last exposure, but still many small swollen lymph nodes in neck that are chronic. im a smoker ?

Not HIV: The HIV blood tests are among the most accurate diagnostic tests ever developed, for any medical condition. If enough time has passed since the last possible exposure (usually only 6 weeks for the modern, standard HIV tests), a negative results always overrules symptoms and exposure history. And of course many minor conditions cause small lymph nodes like this. For sure it's not HIV. Stop testing.