Yes. You are buying one of the largest investments of your life. It will have a complicated contract with a bunch of confusing deadlines. At a minimum, you should review the contract with a local real estate attorney to make sure you understand what the heck you signed and what you need to do.
Is it legally required? Nope. In Illinois, a real estate attorney is not a requirement for buying a home. In northeastern Illinois, most Buyers and Sellers use their own attorney to help with the contract and the closing.