Anyone with TMJ: How do you handle the dentist?

How do you handle going to the dentist? I have not been in several years because I often get jaw pain and it's just too tender to open it too long. I need to go tomorrow though because I believe I have a cavity. They did assure me he's very good, and I've read online dentists give breaks to people with TMJ, to massage their jaw. Anyone here (WITH TMJ) have any particular routine when GOing to a dentist? I'm really on edge for tomorrow 🥺