It's a tough job. As tough in many ways as the person actually WITH the cancer imho. So whatever you have to do to destress so you can focus, do it. It will only help your patient which is the point. My hubs just needed to get out of the house once a week or so to be with friends and he was fine. Sometimes that wasn't doable but most it was. Gotta find your method, your routine, and just embrace it. Only thing is, try not to leave your patient alone.... treatments are hard and unpredictable, so if you need to get out make sure someone is there to watch him in your place.