Business owners, does this happen to you.....?

Every time I go make a deposit at the bank I can't stop thinking about all the money i will owe in taxes next year. This honestly worries me although I am very happy that business is going well. I don't pay taxes every three months because I didn't expect business to go so well, but thats definately what I'm doing next year. I was just wondering if there's anyone out there that feels like me.