Can't shake fear/bad feelings

Hello all. I'm sharing here because I don't want to worry my family more than they already are. I haven't shared all the details with my family because my husband is already freaking out just because of my family history. My mom's family is riddled with cancer. All of her paternal aunts had breast cancer, and there were 7 of them. Her sister passed from Cancer at 34. It was put down on her death certificate as lung cancer, but the doctors told them that they were not sure where it had started. One of my Uncles just passed from Pancreatic cancer after surviving Lung and Prostate cancers. Another Uncle just finished his own breast cancer treatment. His daughter (my cousin) passed away 12 years ago from Breast cancer. Once my Uncle was diagnosed we started getting genetic testing done and have all tested positive for CHEK2 mutations. While I was waiting on my own genetic testing I found two lumps in my left breast. One was about the size of a pea the other slightly smaller. My doctor ordered a diagnostic mammogram with ultrasound, but I have had a hard time getting a clinic to make the appointment. When my genetic results came in I was able to finally get an appointment by my doctor ordering a screening mammogram instead and it being coded for familial history and genetic predisposition. I have had that one and am awaiting the results, though they have already scheduled a diagnostic for next month. I cannot shake the feeling that something is wrong in my breast. I know statistically its benign, but...

The tissue in my left breast is thicker (denser?) than it used to be, both myself and my doctor can note the change and that it is unilateral. Both myself and my doctor could feel the two small lumps and both agreed it almost felt like a clogged milk duct (I haven't lactated for more than a year...). I am having sporadic sharp stabbing pains in the exact spot of the lumps. Both lumps have grown and now I can feel a third one closer to the chest wall and arm pit.

I have three young children. I know that statistics are in my favor, however with family history and having tested positive for CHEK2 I can't shake the fear. I know something is going on and pray that they changes are for a normal benign reason. my logical head and they bad feeling I have don't agree though. If you read all of this thank you. I needed somewhere to vent and express my concerns and fears...