About to freak out

I go to the dentist mind u never been told I had cavities before. Then get told tonight I have 7 cavities between my teeth in the front. She didn’t chart it because there’s apparently so many. Then tells me back in 2014 after I got braces off according to the xrays there was a cavity. I never been told about and never had any thing filled in. So now I have to get X-rays done etc. anyone else ever have a crazy problem like this. I don’t believe her. She bashed me the whole time.