You just have to understand that women do weird things. You have no idea what is going on behind the scenes, so there is no reason to put too much stock and thought into trying to figure out why they do certain things.
In the OP's situation, I would intentionally wait 2 days to respond back to her next text. That will probably cause her to respond faster and if it doesnt, I would refuse to respond and make her double text me if she is interested.
I ran into a Japanese steakhouse on my way home from work Friday to pick up a to go order. While waiting, I saw a chick that I am friends with on FB but dont know that well. I say hi, get my food and leave. A few hours later she messages me on FB "Hey I thought that was you today but I didnt want to say anything". I just responded with "yeah, I thought you looked familiar".
Within a few messages I ask if she has any big plans for the weekend. No response until Saturday evening. On Sunday I asked her if she has tried a new restaurant yet, she says no but she would love to. I tell her "Let me know when youre free and we can meet up there for a quick drink".
She then says "If you would rather text me, my number is ______". I wait a few hours and text her. A few texts in she is asking about going out on my boat, etc. I tell her to let me know when she gets her schedule figured out and is free. Slight banter back and forth up to yesterday evening and she didnt respond to my last text. It goes to show that women will even give you their number and can dry up 2 days later. They do weird sh!t.
Who knows what happened but she knows how to reach me. The longer she waits, the more I will secretly lose interest.
No reason to think too much about it or stew over it. This should be the mindset. Either her wheels start spinning as she wonders why I am not chasing and she messages me, or I shift the little attention she got to another plate that I am banging. It is what it is.
When in doubt, go silent. They will reach out or they wont. You can always hit them with a "hey stranger" in a week to see if there is still interest there.
One thing for certain, chasing is never the answer.