Breast Clinic Appointment

Hi, 

Ive just got back from a gp appointment, he examined me etc as i've been having bad shoulder blade pain, pain in breast and armpit and swollen lymph node.

Im so scared, i am only 17 so the risks are low but i'm still very worried about it being something serious. 

He has referred me to the Breast Clinic for tests, is that a bad sign? can anyone reassure me? 

Xx