Can't get a dentist appointment for 3 months. How big an emergency is gum recession? (Photo)

Hi. I haven't been to a dentist in years because of lack of insurance. Lately I noticed gum recession, and I'm scared I'm going to lose my teeth. I have no idea how long it's been like this. Gums don't bleed. I definitely clench at night and have been feeling a sore lower jaw (not every day, so I think it's clenching related, not anything sinister). I found a clinic but they can't take me for 3 months. What should I do to calm my nerves? Will this get really bad by then? I'm obsessed. :(