Well, first, take a deep breath and get a cup if tea, pref slightly sweet, because you will be in shock. 
Next, if you have a copier, copy your financial dat while he is St work. Eg, your bank account details, latest statement, mortgage or rent and insurance, car insurance, purchase agreement, life insurance and credit card details. If not, take down the key details, eg account codes, addresses and phone nos and amounts.
Then have a pause. It will take some time to do that. Grab something to eat, 
.
Next, look up the numbers of the local CAB, marriage counsellors and solicitors who give you a first session free. You will be able to call them on Monday if you need to.
Then take yourself for a walk. Exercise will help calm you.
Do not worry about the room. If desperate you can paint it magnolia.
Don't worry about the house. Focus calmly on you and him tomorrow. Remain calm...