Thanks for the advice and yes I think I will just call girls from now on, I've realized texting is abysmal and can ruin game! But I haven't tried to hang out with her twice, I just said "we gotta hang out soon" and she said "for sure after my exams

" and then the second time she said "finished my 1st exam, 3 more to go" and I said "then you can hangout with me!" and she said "I will

" and then the third time was the "message from god". So you're probably right about the comment being needy, but each time I wasn't directly asking her to hang out, I was just stating we should hang out soon. I only said that last comment because she finished her exams, so I thought it would be appropriate since she said she wanted to hangout at that point.
Also, I gave it some thought, her phone is probably just dead. I don't see why a comment like that, needy or not, would make her not respond at all. She would at least leave a short response like "yea" if she was getting annoyed, IMO. I'll see if she responds tomorrow. Thanks again.