Ahh man, I know that feeling very well. My old tablet didn't completely die but it glitched out and spazzed very often, to the point where drawing a simple sketch was a huge chore. I had to buy a new tablet of the exact same kind and thankfully it works much better, and now I just keep the crappy one as emergency backup.
I hope yours is better soon! If you haven't done so already, be sure to reinstall drivers or refill the nib on the pen if it's worn down. That helped me many times!
I hope yours is better soon! If you haven't done so already, be sure to reinstall drivers or refill the nib on the pen if it's worn down. That helped me many times!