Fibroadenoma & nipple lump??

I saw the doctor a few weeks ago about a lump under my right arm, she said she thinks it’s a Fibroadenoma and I’ve been booked in for a scan but over the last few days my right breast has gotten sore and now theres a very tender lump under/in my montgomery gland ( think thats what it’s called) which is like a spot and had some white pus in it. Is this something i should be concerned about and go back to the doctor? Is it connected or just coincidence? Thanks for any advice.

It’s probably nothing to be worried about ,but best go back to docs and get them to look at it otherwise you will just torture yourself with anxiety .