You'll hit your stride. Just keep trying.
Try not to draw something personal. Try not to draw anything at all, just draw and see what comes out.
It sounds stupid and a little too simplistic for it to work, but it does.

Suggested reading: "The Artist's Way" by Julia Cameron
It's a very good read.

http://www.noahbradley.com/blog/2012/keep-going/

We all have those moments, art student, amature, professional, we all just burn out from time to time.

If possible, try taking a walk to clear your head before you plan to sit down and draw. Those ideas you mentioned, write them down and go back to them if you get the "itch" to try them again. Or even try a new medium if possible! If I am sketching crap, I go to my yarns and start crocheting something or my Sculpy stash. I suck at sculpting, so I trick my mind to get a little confidence boost on my drawing skills. Hahah! :)

These have helped me get over rough blocks, I hope thay might help you too!

I usually just do the shittiest frustration drawings I can and it helps a lot XD

This is going to sound stupid, but I paintchat a lot - or just invite someone over to draw - whenever I feel that way. Sometimes working with someone gets me back to a place I want to be, creatively.

Either way, you're super talented -- you'll come up out of this. Trust <3