Pre-op today

hello all,

I am scheduled for a lumpectomy surgery next week. My pre op appt is today. I am terrified of the possibilities of course. I am young, in my 30s with small children. Discovered a lump in the lobe of my breast about a month ago. Mamogram and ultrasound showed nothing suspicious. However the surgeon said not all breast cancer is detected by mamogram (esp in the lobes) and they want to remove and biopsy it soon (hence the lumpectomy scheduled). There's also some fam hx of breast cancer. My period has come and gone during this time and the lump did not resolve in fact it got bigger, limiting the chance of cyst. Guess my question is over the past few days I have noticed this sucker increase in size, discomfort, breast fullness, and it now feels tender from the lump area (inner breast near center of chest) all the way out to my armpit (outer breast). What could this be?? Does this seem normal? The spread and growth since monday is astounding me. Nervous to the core. Please talk to me. Thanks. Will update following today’s pre op appt.