5 millimeters is huge…abiut 3/16” in diameter. No way it could be 5 centimeters. That would be ammost 2” in diameter. Still, at 3mm, I feel for ya. I didnt know what was wrong with me at first, and it took me a while to round up somebody to drive me to the hospital (could not walk , just stayed curled up in a ball possibly crying- can’t remember).
Mine was only about 2mm, and gave me almost the worst pain I’ve ever had. Ive also crushed my finger to a pulp, where it had to be reconstructed. The only thing that hurt worse was a stomach bug (amoeba and cytotoxic e.coli)out in the wilderness that had me nearly dead from dehydration. Apparently, super enflamed lymph nodes fron dehydration are very very painful.
Things like these will reset your pain threshold much higher than you thought possible. Things that used to hurt and make you take notice barely make you notice now.