anyone contacted by their employer?

Curious if anyone knows what my rights are while on maternity leave? I gave birth 12/28 and my boss called me in the hospital to ask me work questions and then the person filling in for me has been bothering me every day with things he really should figure out on his own. I want to do the right thing but I feel that I really need to disconnect completely in order to recover and bond with my baby (while chasing my 3 yr old around). Anyone have a similar experience?