we are not all equal. Some people will go through the same number of spooks and falls, and continue on with nothing more than 'butterflies'. Others will be totally paralzyed with fear, and then most of need some recovery time.
For a while, your instructor needs to be telling you everything that you are doing that's good, or right. There's a lot , I bet, that you CAN do just fine.
These hard times will pass. I guarantee it. The best thing you can do to help yourself is to keep repeating that. "This , too, shall pass". and it will. please do NOT allow your negative voice to pass judgement, over and over again. If you catch it, smack it one! mentally, and say, 'down!" "quit! Now!" If you can be strong with your own internal voice, that is trying to sabotage you, you can be firm with a hrose that is being obstreperous.