Painful armpit swelling

I've just been to see my GP who checked over my under arm area. It's extremely tender to touch and I feel lumps (and a larger one) in the upper outer part of my breast. 
she's referred me to breast clinic & I'm awaiting my letter. I feel anxious and scared. I'm 22. I went to breast clinic in December and had my right breast checked over then & everything seemed ok just a small fibroadenoma that was causing me pain when touched. 
im feeling less anxious this time as I know I did the right thing and didn't ignore it.. 

has anyone been through this. I feel really alone..

everything online has scared me