Breast dimple? Normal or not? Anyone else?

Hi all, I am 37 year old with 2 beautiful girls aged 15 and 7. My breasts have always been fine and fairly pert so to speak. I have felt what I feel is a bit of “thickened” tissue on the upper right boob. I now have what can only be described as a dimple there, like a dimple you have on your face/cheeks. I know this is probably nothing but a small amount of doubt is creeping in. 

I went to the GP and they have referred me to the breast clinic but they are slammed with referrals and I have mine in 2.5 weeks. 

anyone experienced similar? Thank you in advance ️