Why do my parents think I'm an idiot?

I think the more appropriate question is why do my parents think following doctor's orders is stupid. They are both adamant that waking the baby every 3 hours to feed her is unnecessary, that the baby should wake naturally and be fed then. 

Let's just not consider that she was a smaller baby and that she hit the 10% weight loss threshold while in the hospital and that my milk hasn't come in fully and that Elise might not be getting enough for me or that the nursing helps both me and Elise. 

Even the smallest things are questioned and I have to jump through hoops to get my mom off my back. Elise developed baby acne yesterday and I googled it and that's what google came up with. I told my mom. Of course, she doesn't believe me. She knows I'm going to have Elise weighed on Tuesday and she wants me to ask the divorce even though it's not a real appointment just a weigh in with the nurse and the doctor is out of town.

That's not a good enough answer, so I had to call the nurse hotline to just get her to leave me alone. Why must I also care for my newborn child and my mother?  Isn't she supposed to be taking some of the burden off me and not adding to it?