Psalms 77 is very special to I personally. That's because of some specific events in my life and my loved ones' lives, that that psalm addresses, and I've had a truly mystic experience with that psalm. Psalms are mystic, just open your Bible to Psalms and read the first one you see, it will have some relevance, without fail.
Also, rest, relax, have fun. This is not "slacking", it regenerates your energy. Everyone gets burned out from time to time.
Try writing down your feelings or singing them or whatever, any time when you feel overwhelmed. Sometimes when you feel that way the last thing you wanna do is focus on that feeling and put it into words, but when I force myself to do so I always find it helps.
JAH guide and protect sis... and remember when one door is closed another is open.