I was drawing fine for a couple of minutes with my pen, and it suddenly randomly stopped being able to draw. When I click with my pen, it makes a dot, and then I can't click anything else with my pen. If I move my mouse, it starts drawing starting from the dot without me left clicking, and I have to left click somewhere to stop that. Also, the pen makes a dot in the spot I click, and then when I do CTRL-ALT-Z, it creates a line from the point I clicked on with my pen, to the spot I did the shortcut. My pen works normally on everything else but photoshop, I think I may have accidentally activated something. Deleting preferences doesn't work, restarting photoshop doesn't work, restarting pen drivers doesn't work, unplugging and plugging in the tablet doesn't work. At this point I think I'm going to have to abandon photoshop, and try to learn illustrator.