I always worry about EVERYTHING! plz help ASAP!

i am always worrying over stupid things that are not important. plz help because it is really ruining my holidays. I am worrying about homework, getting in trouble, lying etc. I am worrying about getting told off for lying to my mum and dad about something but I cant confess or anything. I am also worrying about getting told off by a teacher at school because I drew a naughty picture and she got really mad, but she didnt know it was me and she said she is gonna find out who it was after the holidays. I am also worrying about stupid little things like f I have done the homework right, if I have done enough for my homework or if it is neat enough or is it too messy. or things like: have I left my PE kit in my locker or not or if I will remember that my homework is in my school folder or not. so PLEASE ANSWER!!!!! THANK YOU SO MUCH!