Sugars and sweets!

Emily
This is my first pregnacy and I have been having a sweet tooth and I love cokes, if I try to drink water if I drink to much of it I get very sick and throw up I'm only about to be 9 weeks I know alot of sugars is bad, I'm wanting to know what can I do to cut down on cokes and sugars bc I don't wanna harm my baby with to much...