Looks like your new thread kind of got lost, I'll bump it up.
The rule of thumb regarding contact is to sometimes reply right away, sometimes wait a few hours and sometimes don't reply at all. The idea is to make her think you're moving on with your life and that you're busy and doing stuff on your own, so you're not always there for an immediate response.
I would never wait 48 hours, that's way too long and is going to make her angry.
