The previous Thursday (26th) I got my period and had what I believe was menstrual cramps that day. They then continued onto Friday and were really painful that evening, causing me to feel nauseous and also have diarrhoea. They came and went around twice per day and this happened on Saturday and Sunday. This leads me to believe that the cause was not my period, as this has never happened before and it's almost over anyway. The other thing is, for about two weeks in December, I had the same cramps, often occurring in the morning and evening. I thought it could be an allergy but I've had tests and nothing came up. I'm desperate for a solution cause I can't keep living in pain!