I'm thinking of quitting the independent movie I'm directing. Worst case I strand the cast and crew in the middle of New Mexico and my family loses money, worse case I go insane.
Why do you think you will go insane?
On top of everything else, I have tinnitus making it impossible to sleep at night.
You sound overwhelmed, and for good reason! Can you take a break from the shoot for a few days? Talk to a medical professional, maybe they can prescribe something for the tinnitus and insomnia so you can finish the movie.
Yeah I really need to.
You can let your director or the other producer take over for a bit an run things while you get help. You need to put you mental health before work.