Living with Bi-Polar partner

My husband has suffered with clinical depression for almost as long as we have been together. It is tough but he has had lots of good treatment & now I can see it coming & we can deal with it.
However following the latest bout he has become manic & it now appears he may be bi-polar. This is very frightening as he yells & shouts if you do not agree with everything he says (all total nonsense). He gave in his notice at work ( 3 months luckily) & they have now told him not to come back but are paying all the private health bills & of course paying him in the notice period.
He thinks he has some amazing idea that is going to make him millions although no actual format he can explain. he is also spending vast amounts of money we do not have ( I have taken precautions with bank to keep most of it safe now).
I was really shocked at how hard it was to get him an initial apt just with a GP but once he saw him I was given the advice to get him to a physciatrist ASAP- sorry about spelling!
I had to find one & he has seen him once now & is on pills which have done nothing to help at all so far. We are going again tonight & I am hoping they keep him in for a few days to be honest.
Sorry to ramble but does ANYONE have any advice or any idea how long it may be before we see am improvement.
Also if you give in your notice while obviously depressed can it be resinded ( not that I think they will want to as he was sending ridiculous emails to all & sundry). I might add he has been working 18 hour days & weekends for months now & I cannot believe someone did not think he may have been overdoing it! I tries all I knew to get him to do less but he is a very stubborn person & loves to work.

Any advice much appreciated