General Reminder:
You are not obligated to be here everyday. You have your private stuff, which are more crucial, so don't be afraid to take a break. Length? As long as you need :)
No worries. Your mental health is an important factor.


Instead of sitting in one place, try to go out. Enjoy nature or explore new hobbies. Analyze the environment. It sounds odd, yet it helps you to clean your mind and you think different - less overwhelmed and more energetic. If you have the chance, try to make yourself a nice break from the stuff.