Diaper rash! Help! 😭

My daughter is ten months old. She has suuuper sensitive skin (from me lol). Anyway she had some diaper rash which happens quite a bit, but it goes away with a  few days of A+D cream. Well this time we used Boudreaux's butt paste and she had a reaction to it. We switched back to A+D but it hasn't cleared up yet. It's been almost a week now and it seems to be possibly spreading. 😢 Should I call her doctor on Monday? Or do you have any tips?