I have been prescribed megace 20MG for endometrial hyperplasia/uterine fibroids while I await my upcoming hysterectomy..it has leveled out my moods, but right after I take it, I feel like I have an elephant sitting on my chest, my heart rate increases, I get a headache, and I get really hot. It usually only last for a few hours and then I'm fine... is this normal? Or dangerous? I was thinking about taking it in the morning instead of the evening so I can sleep. Any thoughts?