What did I do wrong? Whats going on? Is this her way of saying she's not intrested?

So, Ive been talking to this girl for about a week and half now. We would have very long pionate conversations over the phone, sometimes lasting more than 3 hours. During this time we exchanged photos, which from what she says, she liked very much and found me very handsome. Last night we finally met for the first time face to face. We were both a bit nervous, but pushed through it and had a great conversation ( at least I thought we did). The night ended, I gave her a very long hug, which from her body language indicated she wanted to kiss, I gave her a short peck and told her goodnight. Later that night I called to make sure she got home ok, and to tell her I had a great time and goodnight. She told me she did as well and that she would talk to me tommorow. So I texted her this morning to say "Good Morning" like I have been doing for the past week and a half, and she still hasnt texted me back. Usually she texts back within an 15 minutes, its been over 2 hours. What did I do wrong? Whats going on? Is this her way of saying she's not intrested? I really like her, and I guess it kind of hurts a little. Any advice or insight would appreciated.