I haven t had a period in 6 weeks, I have taken two pregnancy tests and both negative. I am 38 years old, wake up hot, sweaty in middle of night..crampy like I will start, but wont start. I feel swollen in breasts and stomach, have gained some weight last several months. Not sure why I am not having monthly, not sure if could be pre-menopause, or fybroid cysts, or stress..Just interested in your advice.