Single Mum of 3 terminal cancer

Hi all I was a single working mum of 2 beautiful boy's when I went on maternity leave to have my daughter. During the last 2 months of my pregnancy I started having sezures which at the time I put down to stress on my body (being no spring chicken and having my baby at 40). Baby was induced at 36 weeks due to no growth in 4 weeks. Duringr Iabour I had a sezure (at the time I thought I was having a stroke). Baby was born 1/12/2017. On the 18th December I had my worst sezure yet. I took my self off to the doctors and he straight away referred me to have an MRI. Results come back as having 7 Brain leasions with major swelling which is what is causing the sezures. It's cancer the doc says more tests with a final result Primary Lung cancer which has spread to lymph nodes around the wind pipe and osophagas and into my brain. Non operable non curable. I begin full brain radiation on the 29th of January simply to releave the pressure of the swelling which I have been told can kill me at any moment. I can no longer drive. And should not be at home by myself with baby (practically impossible). I really want to spend as much quality time with my kid's for as long as I have left but have absolutely no funds to do anything with them. I have very little death insurance and no funeral cover. My children will be taken in by my parents so ever cent I have I want to leave to them due to them either having to sell and buy bigger or expanding their existing home.