Early August I found a lymph node in my armpit that was about the size of a pea, moveable, and painful. A couple of days later it was gone and another appeared in my other armpit same size and same pain. This too, disappeared within a couple of days. Late September the same thing happened it both armpits and disappeared soon after. Yesterday, I noticed a swollen, painful lymph node on my neck about the size of a bean, painful, moveable. I also got a flu shot yesterday so I didn't know if that correlated and I'm a full time student. Any suggestions?