Definitely text, it takes the edge off things if you're anxious. Maybe ring her after you've had a bit of a conversation?
Are you living by the 3 day rule? In my experience it's best not to wait too long on contacting her, if she likes you it is likely she wants to hear from you as soon as possible! I know I wouldn't want to wait 3 days to hear from someone i gave my number. But call or text.. calling is probably better. Though texting is fine too, if she likes you you can't go wrong either way.