Last week I was at a rap concert and got brought on stage to participate in a freestyle competition, which I won. After the show I ran into some people who invited me to go to someone's house to hang out and drink and smoke. As we got into the car an HB 8 or 9 got in and since there were 6 of us, they said she'd have to sit on someone's lap, and she chose to sit on mine. As we were driving there she said "I have to shake your hand for winning, good job!" and we chatted a little bit.
Over the course of the night we talked about music, I told some DHV stories and threw some negs, even got her to get me the last beer

(she played like she was offended but went and got it anyway). Things seemed to be going pretty well as she ended up sitting next to me and we were very close together on the couch even though there was plenty of room on my side, and she seemed to be giving me some IOIs.
She ended up going outside to have a cigarette and stayed out there to talk to some other people, and I got bored and decided to leave. As I walked past her I paid no attention to her and she said "Uh, bye I guess..." so I told her to friend me on Facebook so she could send me some pictures she took of the show.
That weekend I sent her a message on Facebook asking her if she knew of any parties, this was her response:
"haha i don't knowwwww i'm chillin at home and hatin myself for not gettin on the party scene
whatev..hit me up haha
(xxx) xxx-xxxx"
When I got the message I didn't see it all (I was checking it on my phone and the second half got cut off) so I didn't realize she gave me her number, so I just responded:
"Oh I thought you were a party girl

well I heard about some joints so ill check those out, ill holler at you later"
The next day I realized she gave me her number, so later that night I called her and she didn't pick up. So I left her a text saying "I'm sorry, was I supposed to call you last night?" I got a text back that just said "Th", I figured she sent the send button too early or something, so I replied "I'm sorry, what does "th" mean?" She never replied.
It's been a few days since then, what do you guys think about this? I figured the fact that she volunteered her number meant she wants me to call her, should I try calling back? What should I say?