Pain in breast and shoulder blade pain

Hi

I had a mammogram February 2020 which was clear. Recently I have been having alot of pain/discomfort in my left breast and have had a shoulder blade pain the same side. A couple of days ago I have noticed an indentation on the same breast . I am waiting for an appointment at breast clinic but am so worried. Would this be anything to worry about after having a clear mammogram one year ago?