We aren't doctors honey...we can't diagnose you. However, I don't think you have cancer. You can always feel your nodes if you go looking for them, and fiddling around with them can make them swell up.
Go about your life, and stop looking stuff up on the internet. It's the worst thing you can possibly do. You could google "drinking water causes cancer" and you'd get a million hits.
You sound anxious...and compulsions bind anxiety.
I think you might have infectious mononucleosis.
I got tested for it on my blood test but do you think I could of gotten it later?
I don't think so. However, keep in mind that in rare cases cytomegalovirus (CMV) can cause very similar symptoms to those of infectious mononucleosis.
Because of your age and numerous blood tests that came back clear, I believe that you are fighting some kind of infection that you are not aware of. Keep in mind that some lymph nodes never come back to their original size following the infection.
It would be a good idea to keep an eye on your nodes and see if they are getting bigger. Just don't poke on them, it will make it worse!
BY THE WAY:
*Where are your swollen lymph nodes located? (It could help identify the location of initial infection)
* Did your doctor check LDH levels?
One on left side of neck halfway down 2nd under the chin back towards the throat. 3rd behind ear on head.