There's more traffic here. This past couple of months have been very difficult financially. Yesterday my oven door fell and shattered

I'm on ADs and I need to get a new pack but it costs €77. But I also need a new oven because I have my dc to feed. There's a second hand oven in the local buy and sell adds for €50 but that leaves me without money for my ADs. I get cb tomorrow but I will only have €26 left after bills are paid and coats bought for the older DC (no option there,they need coats). DH hasn't been paid fully this week and is unlikely to be paid on Thursday either
as the company he works for is in financial shit.
My question is,how long can I go without ADs before I feel ill again?