Let's just start with saying that I am not a guy that often gets a number from a good looking girl. I am a good looking myself but my college's sex ratio is warped 80-20 so I only go out twice a month in a venue with a decent amount of girls, which often makes me a bit nervous. So I don't want to mess this up and appreciate the help.
So last friday I noticed that some girls are kinda looking at me and a bit later one of them is standing next to me. I saw that there was a card of a deck of cards laying on the filthy floor and i say to her "Hey, I think you dropped one of your cards" suggesting that she should pick it up. She laughs, I ignore her a bit and eventually after restarting the conversation she asks how old I am. I am 23 but she said I looked 19, which is kinda true sometimes. Anyway at this point the target gets involved with the whole what's my age thing and they don't believe me and ask for ID, which I reject playfully. After a while they are still going on on that topic so I show it anyway (probably shouldnt have done that but yeah)
At this point I start a little kino with the target and start talking about other stuff. Unfortunately a little bit later one of my friends (the guy who arranged a place to crash for me that night (i'm in another town than my college town)) who was really tired and was falling asleep at a table (he does that often) gets a bit into trouble since a bunch of douchbags are poking him and making fun of him.
So I interrupt the conversation abruptly and go to my buddy to stand between him and the douches and ask him if it wouldn't be time to leave. So I go back, ask her number and say that I'm going to leave at which point she says "But your drink isn't empty yet" But I say that I have to help my friend home. I'm not really that comfortable going further than phone close anyway.
So the day after I send my first text along the lines of:
"Hey, hope we didn't take too much of the party spirit with us when we left. At least you now have a VIP#. Store it with care. Old man -my name-.
5 hours later she replied:
"Haha, hey old man.

It was indeed a good party. Today I had a family gathering so I was tired. Did you guys came home safe?

x
A day later I text back:
"Yeah, a breath of fresh air and we were sober. Well not completely but we found it okay. Now having a great time with this nice weather. You too or is the weather bad in -her town-.
Again 5 hours passed:
"Yeah finally nice weather, also here in -her town-! Ideal to work at my thesis. x
Then I waited three days and just before I went to another party yesterday I sent the alien text I got from this forum from SirSlick:
"Hey I have inside information that Aliens are coming to abduct all the good looking sexy ass people! You'll probably be safe, I'm just texting to say goodbye

"
Now it's almost a day and she hasen't replied yet. I'm getting worried, what did I do wrong and how long should I still wait to send what? Perhaps she didn't reply immediatly and forgot about it later?
Thanks in advance