help!

Hi everyone, ive been reading a few forums and scaring myself! Google is such a dark place too search your symptoms! A few days ago I noticed a indent underneath my right breast. I panicked straight away as I’m quite aware of breast cancer symptoms, I’m only 18 but still I have booked myself in with my doctor today. My appointment is soon, I’m guess my doctor will do an examination? I’m just wondering what other reasons there could possibly be apart from breast cancer? I’ve currently just found out I’m also pregnant! Best news ever, but for the past two days all I’ve been doing is worrying about my boob! Does anyone have any advice? Or any experiences that may calm my anxiety down? Thanks so much x