Terminally ill mum needing help for her babies

Hi my name is louise I’m 48 and I’m dying of terminal bowel cancer that has spread over most my body, my prognosis is months not years. I have an amazing teenager whos 19 who has just started his mechanics apprenticeship, i have a wonderful 9 yr old daughter who has some special needs and i have my lil boy louie who’s 7 and he has additional needs also. as you can imagine the thought of leaving my kids is heartbreaking and i do break down occasionally about it all the things mother and daughter do together i feel so cheated about. Unfortunately their dad isn’t allowed near them as he put me through 8 years of domestic abuse which took me two year to recover from and then bang im told i have cancer and my kids are going to be basically orphans, ive never asked anyone for anything my whole life im a massive giving person and I’m always the first to give to ppl in these situations but i wish for my kids to have a lil money with them when I’m gone so it will help them plus some alterations to my house like partician walls so my sister can take over my house so its less for my kids to go through they can stay in the only house they have ever known. I don’t know how to explain the devestation i feel knowing my whole life I’ve wanted kids and i had them later in life 39 & 41 and now I’m being ripped away from them i just want them to have to struggle less. So if you could please help even if its a penny just for my children. Thankyou