So.. at the club
I open this one hot asian girl and start to flirt quite a bit at the bar area, i get a few ioi's. When all this was happening her girlfriend was sort of observing and she was very drunk. Anyway so then she says we should go dance.. so we do and at the same time we chat and i get a good amount of sexual tension and we grind briefly, then my friend taps me on the shoulder and i turn back around and i see her drunk friend pulling her away. Not to worry... i found her later on just before she was about to leave. I just so happened to have my phone in my hand at this time and she takes my phone and says ' take my number' and types her digits in then she says ' il be angry if you dont text me ' and i take this as an ioi ?, we peck cheeks and she leaves.
Im not sure if this was good but i texted her the next evening.. here is the text...
'Oioi cheeky, here is your text as promised! How're you doing? Did you have fun yesterday?

xxx p.s. If you test back saying you dont know who this is , then il be dissapointed to say the least :p'
Its now been about a day and a half and no text back, im confused since she showed so many ioi's and even said she'd be angry if i didn't text her.
Looking for some advice on what i should do next.. if she doesent text back.
I was thinking maybe add her on facebook and carry things on from then? - or would that seem too keen? how long should i wait for a reply?
Peace