How do i deal with this

Hi all. I only joined this group today but was diagnosed with BC in January this year. I had a mastectomy and 20 lymph nodes removed from left hand side. Cancer was in 8. I have been through 6 months of chemo and am a visit no 7/25 for radiation. My marriage has broken down, i have our 3 sons living with me. I have a casual job (which i love) as i am financially stuffed. My husband lost his job a couple of years ago, we ended up having to sell our home of 17 years which broke my heart and he bought a business using the majority of the money. The business has pretty much failed leaving me with nothing at 48 years of age. I am desperate to get a full time job but until radiation is done that isn't possible. My kids are all working and help out but it is a struggle. I am just so scared the cancer is still there somewhere. My surgeon is confident she got it all but at the end of the day it's in my system. How do i deal with this? Sorry for the long whingy post.