Only a trained health care professional can tell you if the bump you noticed is a
swollen gland or not. If it is, it is not likely
to be due
to HIV, both because of your negative tests but, in addition because when lymph nodes/glands are swollen from HIV, they are typically not tender.
I urge you not to worry about your exposure two years ago- there is no reason that you mention to have any concern about HIV and many good reasons not to worry about this.