Late payments incur terribly high late charges. In addition to that, late payments on a mortgage loan really hurt your credit. A lender may forgive an occasional late payment on a credit card here and there, but make a late mortgage payment and it sends up a red flag. Make more then a couple of payments late and you could have a difficult time trying to refinance or obtain a mortgage loan for another home. You might want to consider having your mortgage payment automatically deducted from your checking account and paid directly to the lender.
Most people deplete a large portion of their savings when buying a home.
You should have made sure you would have emergency money available after close. If you don't have at least 3 months worth of living expenses after you move into your home, you will need to build up your savings again. This should be done before you buy anything for the house. It is almost impossible to save when you keep thinking of new things you need. There will be time later to think of slowly buying things for the house after you have your savings in order.