Don't be paranoid
I was young when floride was put in the water. I drank lots of water since my grandfather told me to, pulling out his complete dentures to demonstrate the consequences of not.
I ate lots of candy and junk food and have no cavities at 58. My parents and older sibs all have lots of cavities and some needed partial dentures. I would not buy toothpaste without it as my current water is without floride.