It's okay! I've been doing something similar.      ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄  
If you're concerned about studying, finish the chapter or section ( i like to stop at places ending in a 5 or 0 like 30 or 55 ), and work for a bit. 
Like a reward system. It's hard - I struggle with it too when it comes to going to bed.
Good luck with your fi......			  
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