I also have swollen lymph nodes and come from similar Situation.
HIV is the least likely cause, but other causes could be stds such as gonorrhea chlamydia syphilis etc.
There's a good chance it may not be those either and could be caused by a more general infection such as uti, ngu or even viral infection like herpes.
Also, anti biotics could cause this.
Am sorry about your swollen lymph nodes.Kindly get them checked and forget about HIV which you were never exposed to.
It doesn't sound like you ever had a risk for HIV, so testing was not necessary.