Two lumps found?

Sorry I feel like i'm going out of my mind and really don't want to worry any of my friends and family... so I thought I'd post here.

Last week I found a lump on my breast, not big but tiny, struggling to see how i've missed it before. I did the right thing called the doctor  and got seen straight away. The Gp examined me and she found a second lump in my arm pit, I hadn't noticed that either. 

I wasn't worried one bit until the doctor found a second lump. 

I have an appointment on Thursday, which feels like a life time away. I'm 39 and a mum of 3 young kids. 

My question is.... Is it possible it's just nothing? Having 2 lumps is that more of a chance it's not a good outcome. I know that no one can give me a proper answer, I guess I'm just trying to find someone that's had something similar to me and i'm just trying to get everything that's going around in my head out. Apologies if you've made it this far into my post. x