Anjia
Was in similar situation a few years ago when I had my op, I kept my ovaries but suspect they failed pretty rapidly , I was on pills, then asked for patches , tried the 50 and then moved to 75 3 weeks later - the difference was noticeable within 2 days, still got some flushes but manageable , then moved to 100 and felt that was too much , cut down the 100 myself so will have around 80 ish and that seems to have all bar an occasional one. Suspect your 50 is not enough.