Michelle, We know that you don't know exactly what is going on or how to repair it or you wouldn't be asking. But, you need to give more information when you ask. If you do know the questions, perhaps you can get a builder to give you a "punch list" of things you need to have done. He will describe your situation and give you the details of how to fix it. You mau need to pay for the services. Ask him what he would charge.
One you know what you have and what you need to do, and you plan on doing it yourself, you can come back to us.