Part of my tooth fell out!

Ka

Ladies, part of my tooth chipped out and I had to get a crown today. Cost me $2200 🥴 my dentist said it happens to post partum and pregnant women all the time. I heard about the pregnant part, but didn't think it'd keep going after I was postpartum!! Any ladies experience this? I brush and floss twice a day and take my multivitamin! Don't know what else I could do....the dentist didn't have any suggestions besides cutting out sugar.