Is she still interested, I'm quite confused?

Okay so I've been talking to this girl, and I finally asked her if she wanted to see a movie with me tomorrow (which is today). And she instantly responded yes, with like a ton of '!!' and junk. so she seemed excited. and then i told her i was going for a run, and that id talk to her later. and she never responded. then this morning at like 11 i texted a second time, and still no response. Its now like 10 at night. Granted, we didnt plan anything beyond doing something today. But I don't know if i should bother trying to reschedule or if shes just ignoring me. ALSO if its relevant were both 16 years old.