I wake up early in the morning drenched in sweat, then I start to vomit big time. This lasts the better part of the day and usually happens about once a month. I am 56 and had a hysterectomy 6 years ago. Could the sweating (ringing the nightgown out kind) be messing with my electrolytes? Could it still be a menopause problem? Tests have ruled out any heart problem. Am on medication for blood pressure, take Lipitor, and Zoloft. Anyone have any ideas?