Is nails falling off a good sign, or a sign it’s getting worse?

Is nails falling off a good sign, or a sign it’s getting worse? I’m pregnant so cannot take anything that is toxic/harmful to babe. For the last month I’ve been doing daily apple cider vinegar /baking soda soaks followed by tea tree oil and Vapor rub (applied twice daily). I also use a drill to fill my nails down and remove thickness and flakey bits (every two weeks). On the weekend, we went to a mineral hot spring and my nail ess