I don't trust dentist

Before I started seeing dentist, I had no cavities. They're amazed I had not cavitity for the past 20 something years. But afterwards, every time they can find a small cavity that the X ray would not even show. I think they did something to my teeth. Now my teeth becomes really sensitive and can't eat anything crunchy or crispy....I can't even eat chips! I think dentists are unethical people who just want to make money!