Finishing

I am currently going through a period where I cant finish any art piece I start. I will start something the out it down to let the paint dry then just never pick it u again or I get half way through my painting and stop there. It's like I getting blocked or lose my energy or interest in what I am currently trying to focus on. I'm at the point where I cant put anything down because I know that I wont pick it up again. It is honestly getting a little ridiculous and starting to affect my school life as well.