tooth damage

I have a medical condition that causes dental problems and it has made my teeth seemingly more brittle. I was eating something tonight that I knew I shouldn't have and now a brittle piece of tooth seems to be coming up. Please pray it would fall out. Thank you.

I want my teeth to be white and straighten teeth as long as I can talk words very clear what I say. No more cavities in my teeth. I don’t like cavities because they make me feel so uncomfortable to causing my teeth to break or cause a hole or damage.