Ok so I met this girl at a local club/bar who was a friend of a friend. My friend, her roommate gave me the nod and she liked me. Had a good game that night, didn't even plan on trying to close it out but did. Had some good texting the next day, all good and we had a date planned for sunday night(which was set before we had sex on thursday night). Call her up Saturday and I told her I decided Sunday was too long to wait, she liked that and we watched a movie, and had more sex, slept over that night. We're getting along really well and have a good time regardless of the sex. Now Sunday night we hang out at my friends house and she's staying over, but we promise each other not to have sex no matter how much we want to so that doesn't end up being all we do, it was hard but we made it. Next morning, everything is fine, comfortable, she says things like, I'm happy here and, you feel really good/comfortable, we watch TV for a little in the morning and she leaves around 11 so I can get ready for work.
So good timing, we both get sick later that day. We text back and forth, I say stuff like, I'm excited about the idea of getting to know you and she texts back I'm excited to get to know you too, Im so sweet etc. Talk on the phone a little that night but I have a fever so I go to bed. She initiates contact the next day too, hey how are you feeling? She initiated conversation on AIM. Wednesday she texts me when she gets out of work in the morning same deal, hey are you feeling any better? Then she IMs me while I'm on my laptop at work and is like hey I'm sorry if I seem like I'm bitchy or gonna be ignoring you, but I'm crazy about school and I'm gonna be really busy today. I respond, no that's cool, i'm very busy with school, and I like you so there's no way I'll get upset at the fact youre a busy person. We get offline with she wants me to call her when I get off work.
I don't call right when I get off I call around 7, no answer, no big deal, she always calls back. Nothing. All day next day, nothing. I text her at 4, hey, hope you're feeling better

. That's it. No response. No call or text since then. And I haven't even seen her online at all. That was Thursday and today is Sunday. I decided that calling her right now would be a bad thing, but what happened and how do I play this? I have no real problem picking up girls, it's keeping the few like this one that I like that's my problem.