I don't know if it's the same thing, but my teeth are very sensitive and they look odd in certain places. Patchy and at times a bit see-through. It's because I take a lot of medication according to my dentist. It doesn't even matter what kind of meds, it's the 'packaging' that hurts your teeth. But I've been taking a lot of pills every day for years now and it isn't as bad as what you're telling me.

It could be your diet? Some food and drink can be very acidic. Orange juice for example.