Is she ignoring me, or is she in trouble?

I asked a girl out a week ago, things started off kind of strange. When I met her she seemed really shy and nervous, I got her number and texted her. Well instantly she is a different person, kind of a full switch. I guess it's a behind a screen kind of thing, attempts at dates got cancelled. So I just started talking to her in messages, and things were going ok. Four days later she adds me on Facebook Andy tells me her phone was disconnected. I asked her out again getting but we decided to just do a skype call in our pajamas. To be honest that skype call was the first time I've felt happy in a long time, it's been a tough year. So last Sunday we were messaging and she just vanished. Like she sent me a message, I was out and forgot my phone at home. I missed a message by 30 minutes and replied to it. It's now been 5 days since she was active on anything I have her on. I kind of suspect it was a scam and she found out I was a broke kid and decided to just drop me. I mean this girl was super out of my league. On the other hand, she said her phone was off because her sister was mad. Did somthing happen to her? I mean, if it was a scam did she scam the wrong guy and he has her killed or tied up somewhere? What if she got hurt in accident? Another person on her Facebook posted asking where she's gone. Am I stuck on the limbo Facebook page where the rejects go? Or is she in legitimate trouble?

When we first met she told me she was a Redditor. At this point I don't really care about a date or relationship, I genuinely concerned for this girls safety. It's a nagging thought in my brain I cannot shake.