Met a girl, had a quick chat, got her number, now no answer?

[Gearld]

So I met this girl at the bar a little over a week ago at a friends bands show. We had a really great chat and feel I like I can read people pretty well after a first impression. Obviously I found her absolutely amazing and just my type, which is why I'm on here.... Anyway, I got her number, she texted me right after I left the bar asking if I was friends with the other band, we texted a bit back and fourth about the bands. Then stupidly in my drunken state, right off the bat I asked what she was up to the next day... Which is now still the last text in that convo. She did add me to Facebook the next day though, so I tried calling her a few days later to ask her out for a coffee... No answer. Tried again today (about 4 days later).. Nothin. Should I leave her a Facebook message asking her? I'd rather not in a phone message.
How can I get a chance with this gal?