Wanting to leave

I’ve been an RA here for 6 months and I can not do it anymore. This job has greatly affected my mental and physical health. I can no longer sleep, I struggle to eat enough, and I don’t have time or energy to even clean around my own house anymore. I’ve developed really bad insomnia and either can’t sleep before my overnights or the night before Saturday even if I stayed up all of Friday and got no sleep. This job is easy but so stressful. I’m constantly shortstaffed on Saturday and Sunday. Saturday is almost as busy as a weekday morning for kitchen and I only get one clerk until like 10 or I I don’t get one until 7 and end up opening kitchen myself.

How bad would it be to quit without another job lined up? I just want to be able to sleep and have time to do interviews? I’m searching but I don’t know exactly what to do or what would pay well enough. I just know I can’t stay here. Any advice would be much appreciated. Thank you, Struggling RA.