Aha, I get it:

Back in the ER, 12 hours and counting.
Look at a QWERTY keyboard, it may be true of other keyboards as well.
B and N are right next to each other.
I'm guessing that Mrrzy, presently in the ER,
sent this from her Iphone using that keyboard.

Do you have to be there alone?
Can your other son keep you company or something,
or can he come for you when they release you?
Or are you relying on friends who are not blood relatives?
You ought not have to do this all by yourself.