Of course his manic episode will pass! Bp is a cyclical beast, nobody stays in one mood state forever.

Its good that he's inpatient, they can stabilize him faster than what can be done on the outside. Generally they pump you full of tranqs to slow your brain down, and thus end the mania faster...

I'm sorry you were blindsided like this, and at such an aweful time too Just hang in there, because if there's one thing you can count on regarding bipolar, its that "this too shall pass".