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.
Why do I get cramps almost two weeks early before my period? Occasional symptoms?: A doctor can check to see if there is any medical issue, if a woman has mild menstrual-related symptoms. Many women have some variation of their mucus discharge, their periods, or a missed period on occasion. Some women feel normal after a few days, but others do have bothersome symptoms and follow-up with doctors. If significant cramps happen every period, getting checked out is a good idea. ...Read more.