When I was student teaching it was really hard for this reason. I found the kids to be helpful and have a sense of humor about me losing the chalk- they knew where I'd set it down while disassociated. Don't be so hard on yourself. Look at it as if your mind is operating differently and you and your class adjust for that and you are still a brilliant, effective, qualified teacher. Plus your uniqueness, the things that make you YOU will enrich those students' lives forever. Maybe they will learn it's ok to be yourself , maybe it will help them accept others. Maybe your being genuine and real and human with them will help them to connect and learn better. Did you ever stop to think maybe the way you are is ok? Maybe you are being and doing exactly what you were meant to? Just a thought.