Hi yes the waiting is the worst.
My tumour was missed on a mammogram only 12 months before I found it as a lump .I had a wait of 6 weeks from diagnosis to my mastectomy as I had to undergo a variety of tests and missed a week due to getting a cold and Covid 19 protocols.
I felt like I had a radioactive beacon inside my breast and was 11 out of 10 on the anxiety scale! My surgeon said it had been there a long time and the wait was not going to harm my prognosis.
Try and keep busy in the lead up to the surgery , exercise is good and also I bought some nice books to read .Take care🌺