My dr. put me on it because I was getting hotflashes, anxiety, and dizzy spells with premenopause, I felt good up until yesterday, when all of a sudden started getting, lightheaded, headaches,anxiety, nausaus, and fatique. Has anyone else experience these side effects? And are they side effects that go away over time until your body is used to the medication? Please answer asap as I'm quite concerned about it. Thanx