I've been out of the game too long, bruh. Don't know if I can offer too much assistance. lol. However, I think it depends upon the rapport you established from the jump. If you met her and engaged in a good convo for a while, then I'd think it would be acceptable to call her the next day. Whereas, if you simply spit some mad game and got the digits in a couple of minutes, then there's nothing really invested there, so waiting a day or more will neither hurt nor help. Cuz, it's likely that if you got the digits in that short amount of time, someone else is likely to have as well. Then, it becomes a matter of not when you call, but how good your game is when you call.
Just my 2 hundredths of a dollar.