Do this:
Sit back and chill for one second.
You sent her a text and she responded...this is good.
She said she was feeling bad. Sounds like she started her period. Some girls cramp super bad their first day. She felt like shit you are lucky she texted back at all.
Make sure you never get needy. If you think you are feeling needy turn your phone off. The worst thing you can do is continually text the girl over and over. Yes she could be busy. She could be sleeping. She could be watching a movie. She could be doing a million things that keep her from texting back right away. She might even just not be inclined to answer. I unfortunately do it all the time with people who don't have enough value built up with me. I feel bad about it but I get busy and then bam a day went by and I forgot about the text. I can't just all the sudden respond to that text a day later. Most of the time that would be odd.
I say just wait a while and do nothing.
She might send you a text.
She might not.
Just wait a day or two and send her something. I am no text genius but I would try to keep things playful.
I can't tell you how many times I have simply used: HI as my text opener. Even with girls I have not slept with or even taken out yet.
Most importantly chill.
And second go meet some more girls. It helps big time when you have many options. Neediness pretty much dissapears.
