Delay in treatment

Hi, I've just turned 43 and have grade 3 invasive ductal breast cancer ER and HER2+. I've been going through this journey since 1st October 2020. I had a mastectomy on the 23rd November and now I'm waiting to see the oncologist to start Chemotherapy. I feel like this is taking to long. I had a lot of delays due to test results not being ready when they should have been etc and I've been really patient but now I'm getting really worried. I know that the treatment is to prevent it coming back but I feel the longer I wait for treatment the more likely it is that any stray cells that are left could be growing. My life has been turned upside down and I just want to get it all over with so I can get my life back to some sort of normality. Is it normal to wait this long for treatment? Is anyone else in a similar situation? 
Update: just opened my oncology letter, my appointment is on the 4th February but they still seems along time away? 
 

Neenie x