Most of us simply try to juggle too many things at the same time. We want to sleep enough, have a social life, we want to eat healthily and work out, and be good at what we do for a living (and earn a lot, if we are being honest).
Just as there is a famous turnaround time-price-quality triangle for professional translation services, there is the sleep-social life-work triangle for everyone, including freelance translators. One of these pillars will finally break, especially if your expectations for the work part are not set with an appropriate limit.
The main advice here is not to stop working at all. Simply don’t take on too many jobs at the same time, especially for longer periods of time. Doing it once every couple of months is forgivable, but continuously living as if you are trying to reach a finish line, is very exhausting for the human body and mind, especially if you’re a freelance translator, having already a stressful schedule by the very nature of the work you do.
If you never give yourself a little bit of time after you finish a task, rushing into the next one will bound you to drown in this purgatory you are setting up for yourself. Be smart and back off, especially when you feel point 2 creeping up.