Its not the end of the world.
ok i know that education can be tough at times but i dont see why worry about it. One grade is not going to determine your future. what will determine your future though is if you let that get to you and you become off focused and fail to do anything, this applies to many other situations too.Instead of letting it get the best of you do something about it. sometimes it may take a good amount of time to get over it but it always will eventually be resolved. trust me it will only be as bad as you make it. and the worries will only last as long as you make it last.I worry about things to but i dont like to carry them on so when a problem occurs i try to fix it right on the spot immediately.it all depends on your personality and how you handle situations.