My 32 year old daughter told me last night, she is getting hot flashes, cold sweats ,nausea bad cramping and the need to call into work, only on the first day of each of her periods. This started about 3 months ago. I told her to go to the dr to get checked, but in the mean time, does anyone have any thoughts on this? She is a veegan, but, said her periods were light and easy for years. Now this.