Dizzy, nauseous & exhausted for months - can a dental crown make me sick?

I have needed a decent bit of dental work done. I found a great dentist, but they were expensive. After having some work done by them, I ended up switching to a dentist that was closer and more cost effective. The crown work by the new dentist was awful, I constantly had food getting stuck and it looked bad. I have been dizzy, nauseous and exhausted for a few months and after having loads of tests done with my physician and no answers, I am wondering if it could relate to the crown