Yes, you 真係唔0岩. It's so obvious. But I am surprised you didn't know you are the one who is wrong.
Your mother-in-law is not your paid emplyee. So, if she didn't call you before she left and after she came back as you would like her to, it's OK.
When you needed her help to bring you BB to see the doctor, you called her to come over. The next day when you stayed home adn didn't need her help, you "changed face" and said you didn't even want her to be in your house. You don't just "use" someone. It's important to know how to respect people too.
Please don't mind, LZ is 幾霸道... Your husband seems to be a reasonable guy. Treasure your relationship with your husband and his mother. Not everyone can stand 霸道 and unreasonable people for too long.