note: i've gone posting crazy today because i'm terribly sick with the flu and have nothing better to do at the moment...wish i could have been out doing approaches today...i'll be outta here tomorrow, don't worry.
first, considering you've posted this thread 4x i don't think you should call her at all and go do some cold approaches on other girls, because you've already placed way too much importance on it. and imo, it can only go downhill from here.
if you do call, i've come to learn that there is no rule set in stone. call when you feel like it or have time. i made the mistake of thinking you gotta call x days after you get the number. it's not that black / white...i think it all depends on how "hot the iron is" or something like that, as gunwitch would say...
also, no offense, and i bet there's mixed views on this, but if you're just starting to gain some 'game' i'd recommend deleting your myspace account, or using the net/IM to meet or hook-up with chicks. it became a crutch for me, and actually made me less social though i thought i was being social by having a long aim list...i haven't touched IM/myspace/facebook and cancelled my accounts...doing cold approaches in the real world is so much better, you'll learn a lot more. you may regret it soon afterwards or maybe even a few days after, but overtime, it will force you to get out and meet more people and you will love yourself for doing it.
whatever you choose, good luck