The general solutions for the harmonic oscillator differential equation fall into four general categories: 1) Undamped: [math]x(t) = Ae^{i\omega t}[/math] This is a free-running sinusoidal oscillation that doesn't change over time.
Key Facts. 1  Itâs normal to have mild cramps during your period. 2  Menstrual cramps often start 1-2 days after your period begins. 3  If your cramps donât get better with over-the-counter medicine, you should see your health care provider.
I get HORRID cramps on the first day of my period for about 2-3 hours and they're KILLER. They make me feel like I have to puke, I can barely stand/walk, my body gets achy and I get headaches, I feel like I'm burning hot, as well as many more horrible things I feel during that cramping period. A few days...