I’m a teenager and I brush my teeth every day, and only brush once when i forget to brush at night. I don’t floss as much as I should, but I still do. I also use mouthwash regularly. A few months ago I went to the dentist (after about 2 or 3 years of not going due to insurance issues) and found that I had 16 cavities. I’ve gotten 8 or 9 of them filled, but one of my teeth with a filling is starting to hurt as if I have another cavity in that tooth, which worries me immensely. I got the filling a few months ago so it may be possible that it’s just residual sensitivity from the filling...but I’m really worried it’s not. I also have no clue why I had so many cavities in the first place, especially because when I was a child i had bad oral hygiene and hardly ever had any cavities. Are there any sort of autoimmune or other types of disorders that could cause several cavities?