I know this isn't helpful because I do not have useful tips and advice like Quirky did, but I can offer some solidarity in the fact that I can relate right now. I have been procrastinating so much recently and I have so much work. The amount of work I have is stressing me out, and this anxiety causes me to distract myself and procrastinate (which is what I'm doing right now unfortunately), and this procrastination and lack of completed work causes even more pressure and the cycle continues.
I have told myself to restart and make a change; "I'll start work and won't stop in an hour", "Tomorrow is the day I'll complete all my assignments", "Tomorrow is Monday, I can stop procrastinating and turn my life around next week" etc etc. It never works unfortunately.
I know this probably isn't the advice and support you were hoping for, super sorry, I just saw this post and found I could relate completely. You aren't alone.