This will be merged to your story where it should have been posted in the first place. Posted here it is out of context and context is most of he meaning in communications.
If you get an ego boost out of her contacting you, then you are still involved emotionally. IF you had asked these questions a month ago, it would have been more understandable than it is now when you claim it doesn't matter.
That you have been thinking about this for over a month, says that you need to examine why it is so important to you to know that a month ago she was thinking about you.