Caffeine intake?

How did you ladies handle your caffeine intake while pregnant? I'm newly pregnant and finding it tough to exclude caffeine completely. I don't drink much in the first place but I'm just worried it's effecting my baby negatively. While I drink water throughout the day I yearn for a can of pop (soda or whatever you may call it) when I get home from work. Occasionally I've been giving in to my one can of pop and other days I can hold off. Is this okay? How do you all feel about caffeine during pregnancy?