I don't know how to deal with my mom

So I've been on bedrest in the hospital for the past 7 weeks. Most of the people who visit me give me the curtesy of telling/asking me what day and time they are coming. My mom used to give me this curtesy, but lately has come over unannounced. It has lately been bothering me, as occasionally I have tests or something done that I'd rather she wasn't here for. I love my mom, but this situation with my son and his tests is something personal that I'd rather myself and my hubby be the first to know about if something goes wrong.

Well last week, I get a call from my mom telling me she can't come because she didn't feel good. I didn't even know she was coming that day, but anyway I told her that was ok and to feel better. She mentioned something about coming the next day, I told her I was already having visitors, she asked what time I was having visitors (since all the rest give me the curtesy of the time) then tells me (not asks) that she will stop by. I tell her I'm not sure how long everyone is staying, then she gets off topic.

Well, baby boy wasn't doing as well on the monitor that night, so he had to be on longer in the night. So I text my mom in the morning telling her I need some time to rest that day since I didn't get much sleep because of the long monitoring. She asks about the next day, but I had people coming then (hubbys mom and family) plus since she had been sick, I told her maybe wasn't a good idea. She says "well tell me when you are ready for me" and ends the conversation. I ask her about Tuesday, she doesn't give me an answer. I wait around Tuesday asking her when she was coming. She doesn't respond until noon telling me she'd come later that night.

Then today she says she's coming over. I ask her when, she says "idk when I'm allowed." I tell her she just needs to let me know what day and time and I could let her know.

Ugh I just don't want to even deal with that, I have enough on my plate and I do not think it was bad to ask to reschedule,especially given that she was sick! Besides, everyone else gives me curtesy asking when they can come. I love my mom but she is the type that will complain about it and try to make me feel bad when she comes, like I really wronged her. She can be manipulative and I never know how to handle her! Help! Lol