New to this

Without knowing your stats it's hard to know where your mfp number came from.

Did your Dr give you a reason for restricting calories that low? That's low for most women, unless short, older, sedentary. Unless you have a specific medical reason to limit calories a lot, I'd go with MFP recommendations over a Dr's. Losing weight quickly isn't usually the best idea unless you have a lot of weight to lose.

That said, mfp doesn't make you eat a certain amount - they aren't your mum or the food police. If you insist on eating less, just log your food and eat the amount you want, disregarding the mfp recommendation. Completing your diary every day isn't necessary, so no need to worry about that function.