Lump in axilla - been given antibiotics for 7 days and if it doesn't go I'll be referred to the breast clinic. Has anyone been through anything similar?

Hi everyone ️.

I recently found a lump in my right armpit and I thought it was a spot so I tried to squeeze it. Nothing came out. There's no head or pimple in the middle. It's not hot or hurting and it's painless. It's not even a ingrown hair because I don't get chance to shave.. And I don't have periods so it's nothing to do with time of the month. I'm also not ill or fighting with the flu or anything. 

I went to the gp and she felt it, she said she wanted me to try antibiotics for 7 days and then if it doesn't go ill have to go to the breast clinic. 

Has anyone else been through similar?

Kind regards and thank you for reading ,

Beth