Sick father- Will not be able to attend?

My wedding is 4 weeks away,

My dad has just relapsed and his cancer has returned, he is already deteriorating and will be going into hospital in 4 days, he will be in isolation (no visitors). And will be on strong chemo and then a transplant in 4 weeks.


I do not know what to do, I can't get married without him? Every girl needs her dad to walk her down the aisle..
He is so sick though and we tried to have a family ceremony in a few days but he is not well enough and sorting out going into hospital.
Family are saying go postpone the wedding and have it later early 2020 or something- I'm just afraid he won't be here which I'm not 100% he will be.
Also 4 weeks away we will not get any money back it's too soon - so it's more of a cancel and re plan the wedding later kind of thing.
It hurts so much i wish I could just do it now but he's too sick and can't even do a hospital ceremony as he will be in isolation.
How could we even afford abother wedding we would need way more time so it would be a while before we did.

I'm honestly at a loss.
My partner is so upset he feels broken for me but he still wants to continue as people have organised things and everything's in place and he wants to marry me (bless him). But he also understand where I'm coming from and he's the same it's so hard.
But is it all my choice if we cancel and he doesn't 100% want to. It's his day too right? But how do I do this without my dad I just - I don't know if I can.