Please help

I'm so terribly scared. I had ER and PR positive breast cancer two years ago. It was 10mm left breast tumour, stage 1.and was removed with a lumpectomy. I had radiotherapy. Tamoxifen gave me gynaecological problems and so I chose to have zolidex injections each month and anastrozole. I'm 46 and was 44 at the stage of diagnosis. I have always had very lumpy breasts and now the lumps (multiple) on the right upper outer area haven't shifted and so my yearly mammogram has been brought forward by two months (I've had one clear mammogram since diagnosis). I go on Thursday. I am so scared and I don't know how to cope with my anxiety. Nothing is touching the fear not even breathwork etc. Please help me