Armpit lumps?

A few months ago I had lumps in my left armpit that grew bigger by the hour. Antibiotics helped then. They shrunk and just left a bruise-looking discoloration.

Fast forward to today, they’re back and this time twice as bad. They’re on the left AND right sides! My appointment for it is in 4 days. I’m trying to tell myself it’s no big deal and that I just need antibiotics, but I worry. A lot.

Googling doesn’t help my case. The results go from ingrown hair level of seriousness all the way up to breast cancer level of seriousness. I’m stressing so much over it!

(Sorry for the prickly armpit pic. 😳😬)