Concerned about this change I noticed

Bee

I'll be brief. I stay up for no reason, even when I am really sleepy I still stay awake and avoid sleep like the plague! I don't know why I do it but I'd like to stop. My appetite is so low. I try to eat foods that I know I usually love just to get something in my tummy but I don't even finish my favorite foods. Why? Also, I've always been a night owl but. usually a productive one. At this point I am staying up for no reason at all. There is a lot on my plate right now with graduate school, bills, living on the other side of the United States away from my family, my relationship, still dealing with the loss of my parent from December 2016. I am 23. I am noticing my appetite change and staying up late for no reason recently. My stress level on a scales of 1-10 is a 7. What is this? Is it common? I have no diagnosis and this pattern has lasted without stop for two about two weeks. Can anyone relate?