You said your husband is still capable of taking care of your son. I don't know about insurance in the US or anything, but as I see it, if that's what it takes...

You can be inpatient for a week I guess, right? I don't know how it works in the US.

But hopefully you have slept a few hours before that time. It's different for everybody of course but my last long period of mania I slept far less than that. I just tried to rest for 2–4 hours, just lying down, I couldn't do it in one stretch, as I was manic, but during a 10 hour period or so at night I tried. I slept maybe one hour after one week of resting like this. But one hour is a lot. Any amount of rest or sleep helps a lot.

Just don't panic or it'll get worse and likely (more) psychotic. Just try to lose as much energy as possible.