You're having a classic panic attack. You're posting this with the hope of receiving "Don't worry your odds are low" responses, which will make you feel better for a short time before it comes back. The fact that she isn't even late with her current period shows that your anxiety level is unreasonably high.
I recommend this book: http://www.amazon.com/gp/product/1400097...1400097665
I recommend this book: http://www.amazon.com/gp/product/1400097...1400097665
Roosh
http://www.rooshv.com