Dimple under left breast and GP found a second lump

I found a lump (which I actually thought was a bit of bone) under my left breast on Friday past. I went to the GP yesterday and she confirmed it as infact a grape sized lump. She also found a second one in the middle of the lower part of my boob, which I hadn't and I'm shocked to have missed it as I've not got the biggest breasts. 

She said she'll do a cancer referral but I'll wait about 2 to 3 weeks for an appointment at the breast clinic. Needless to say I am worried sick. I'm 33 and have 2 small children. My first thought was not to panic bit as soon as I came home and seen them, my minds gone into over drive.