I only just started cutting like 2 weeks ago, and didn’t realise that I had to switch. Till someone mentioned that the whey protein I have may not be low fat. I make all my own food so they are not super high in calories anyway. But I essentially was washing my meal down with a meal and didn’t think about it.
Words mean things. Whey protein is
*always* low fat because it's just protein and fat is a completely separate macronutrient.
Weight or mass gainers are not whey protein supplements, although they almost always have whey protein as at least one of their protein sources. Mass gainers are designed to be calorically dense and so they are usually not "low fat" because 1g of fat has more than 2x the amount of calories as a gram of carbs or protein.
As a woman, unless you're trying to go up a weight class for sport or are a recovering ED patient, you prolly shouldn't have been on a mass gainer in the first place.
Posting a pic of the label might clear up some of this confusion that seems to be surrounding your posts BTW.