Did I get rejected? I'm confused?

I texted this girl in my class last night saying I was going to an event tonight and asked if she wanted to come with me. She said I'll let you know. She hadn't gotten back to me so I assumed I was rejected and felt too tired to go on my own so I called her to say I wasn't going.

She picked up immediately and acted super excited to talk to me. I said I was too tired to go and she said, ok well go next time. I said bye, and she said wait, then wanted to talk for a tiny bit more.

She just sounded so happy on the phone it made me confused if I was rejected. Thats the first time I ever called her, so I dunno how she normally sounds. I've only texted her before.
Did I get rejected? I'm confused?
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