(Concern) I'm unsure whether I should get a dental check-up.

I had orthodontic treatment, so I received a regular check-up and scaling in January of this year. I also had a dental examination during a health check-up last week. Recently, I’ve been feeling a slight sensation when chewing food on the area of my left molar where I had a cavity treated. I’m considering going to a nearby dental clinic to take some X-rays. I’m worried that a cavity might have developed in the gap. As I write this, I strongly feel I should take a sick day and go see the dentist. I should go, right...?