my mother in law is driving me crazy!!!!

Before I had my son I got along with my mil great. I love my husbands family and feel lucky that I have such good in laws. However, ever since I had my son, she has been driving me insane. Like I almost can't stand her. The first three weeks after birth she was at our house every day wanting to hold her grandson and getting mad when other people were there to see him because they were taking away her "baby time". Then after my husband went back to work she would text or call me almost every day wanting to know if I "needed help" aka holding the baby while I did housework.  Before my son was born she wanted to watch him when I went back to work but her husband wouldn't let her quit her job. So then she wanted to pick him up from our babysitters after she got off at 1:50 and bring him to our house to watch him until one of us got home around 4:30. Three weeks into me working and she's having panic attacks saying it's too much and she doesn't know if she can continue doing it. Baby was crabby yesterday and got on her nerves. Yesterday she was complaining because she didn't get home until 7:00pm even though she left our house at 4:30. I'm so over her and her shenanigans. I feel stressed out all the time and every time she watches him I cry because I know she's not going to do anything I told her regarding naps and feedings. Sorry for the vent I want to say something but I feel like I can't talk to my husband about it because it's his mom and I don't want to cause problems between us or his parents.