Am I annoying her or something?

Anonymous
This girl and I are friends and we normally talk a lot (like texting more than half the days in a week) but like today has been sort of weird

Like, we sent each other like 80 texts over the weekend and like we talked on the phone for a while Sunday night and when we were talking, she said she was gonna hang out with her friend the next afternoon.

Anyway, I texted her last night since I had a question but I didn't get a text back. Got home and saw that she was on Facebook for hte first time in at least a few months (she doesn't ahve a computer), so I tried messaging her. Didn't get a reply and she kept on signing on/off all night

I got a text from her earlier today about how her phone died last night and that's why she didn't text back. I said like OK and said that I noticed her on Facebook last night and that I messaged her but she never on it. She never acknowledged that text, but we then sent like two texts and then she said that she was hanging out with a friend and that I could text her later

I texted her later but didn't get a reply but then I had to text her something else since I had a question about something she told me. She got back and answered it and then I tried starting up a conversation by saying like how I've had a good past few days

Normally, when I say somehing like that, she uses a lot of smileys and exclamation marks but today she was jsut like "That is so awesome, I am so glad". And she said that she needed to call her dad and get ready for tomorrow and that she'd talk to me later

I may be overanalyzing but since we've talked so much lately and since she acted sort of weird today, I'm wondering if I annoyed her by trying to text too much or something? I mean, she said we could talk tonight, but when I tried, she pretty much said that she was too busy.
Am I annoying her or something?
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