I was sure I would be able to handle everything. I planned on painting most of the house inside when I was home on maternity leave. Tell people who want to visit to wait a few weeks until you and the baby have adjusted to your new routine. If it is hard for you to say no, then use an answering machine to screen calls or allow your helpers to do that for you. If people offer to help, ask them to bring a meal or to come over to dust and vacuum the living room.
People like to feel helpful and appreciate concrete suggestions.
Tell them you are going stir-crazy and ask them to come see you and bring all the latest news. Doing so may be difficult because you are so focused on your baby. But remember, your baby needs you to be healthy and at your best. Our society teaches women to put other people's needs before our own. If this is your pattern, think of a balance between your needs and those of the baby.