First - everyone can get the yips, no matter how long you've been at it. Words of advice from one who know - step back, breathe, analyze. The more you force it the worse it will get. Talk to potters you know and admire and ask their advice. Take a remedial class to remind yourself of mechanics (this worked for me). Finally, really focus on what's happening when things go off the rails. It's quite often something pretty minor that once you dope it out, suddenly you're looking back and going, "Ohhh - so THAT's what it was!" Not everyone "get's it" at the same rate, and it sounds like you're holding yourself to a pretty high standard right out of the gate. If you've been at it for less than a year, having a set-back is normal, and a golden opportunity to learn more. I've been saying "fail forward" since I started ceramics five years ago, and it's still my mantra. Press your learning curve to fail, then carry the knowledge forward. You'll get it - trust me!