Cramping for 3 but no period feel like burping but can't and feel like am gassy but can't go to the bathroom what could it be?

Several reasons: Though cramping is often a sign of menstruation, it can also be a symptom of other occurrences within the female body. For example, one major reason for cramping but no period is pregnancy, as sudden cramping and the lack of a period are often the very first signs of conception. Ovulation pain is another common reason for cramping without getting a period, since the period usually comes about two.