Another Freaking Cavity?

I have been to the dentist 6 times in the past couple of months. The first 4 to take care of my root canal, the next two to work on my retainers, and my basic checkup. My cleaning was yesterday, and I ended up with a cavity! What the heck?!?! It must have something to do with getting older, because I only had two cavities in my life before the age of 26. And now, in the two years since, I have had two cavities (that BOTH turned into root canals), and now this one. I swear that filling it hurt worse than the last root canal. I felt more than pressure this time. So here's to flossing twice a day instead of once, rinsing with Act, and using fluoride toothpaste. Maybe it will make a difference? And you know what the weird thing is? My next check-up is the last week of school. How crazy does that sound?!