Hugssssssssssssss
It must be really hard to always be at your best everyday. Sometimes when an A+ student has a bad day, the teachers get on their cases because they know the student is more capable than what they are showing. Sometimes having a quick chat with the teacher to ask them to quantify why they are thinking you aren't doing good enough is a way to get a better communication and expectation between the both of you.
I wish you well dear........don't forget to BREATH!