Don't go on a spending spree using credit if you are thinking about buying a home, or in the process of buying a new home. Your mortgage pre-approval is subject to a final evaluation of your financial situation.
Every $100 you pay per month on a credit payment could cost your about $10,000 in home eligibility. For example, a car payment of $300/month could mean that you qualify for $30,000 less in a mortgage.
Even if you have accumulated enough savings, you should consider not making any large purchases until after closing.