Failing this class

I’m in online college courses and I have a final paper that opened today, it is due tonight. I asked my husband to stay home and help me watch our 8mo sick daughter so I could write this paper. I asked him to stay home back in March, he has days off he can use. This morning he left and I was already up and working on my paper, I asked him why he was leaving and he said to go to work. I said “I thought you took off, that’s what you told me? How am I supposed to get my paper done?” And he shrugs his shoulders and leaves. There is no way I’ll be able to do this paper, and that means I will fail the class. My anxiety is thru the roof right now. We have no other family to help us.