CHEK2... my genetic plot thickens?

I came across this thread and think I will look into genetic testing and will ask if it can include CHEK2, as there may be a family history on my father's side. My paternal grandmother died from cancer at 53 - the family is not sure if it was breast cancer or potentially pancreatic cancer due to lack of testing at the time (in the early 1970's). Two of her sisters had breast cancer when they were older. Her daughter (my aunt) had breast cancer at 41 in the 1990's, and again in her early 60's  in the other breast (5 years ago). She also has Hashimoto and an underachieve thyroid. She also had pre-cancerous cells identified by a colonoscopy. My sister also has Hashimoto's disease and my father has had a lot of polyps. There has also been breast cancer in my father's cousins on that side of the family. I was diagnosed with breast cancer this year at 41. My surgeon after hearing my family history referred me for genetic testing, but I haven't chased it up yet, as I was focussed on getting through chemo. Now that has finished I will look into it again.