Hello everyone! I'm really asking for help! My daughter has had diaper…

Hello everyone! I'm really asking for help! My daughter has had diaper rash for almost 3 months, and it's very irritated on her bottom, we change diapers frequently, mostly going without them, I use wipes... today it appeared very strong irritation, like a burn ? I'm very worried... Suggest some effective ways to forget about irritation and get rid of this, please ?? Question 2 Due to constant stress, because of personal problems today there is very little milk, like now there will be only one drop and it won't be enough ? I don't know what to do... Should I go buy yogurt/mixture or is there a chance that tomorrow there