Hi Sammiejane,
Lots of people have reactions to utrogestan (or progesterone generally). Headaches and low mood are the most common but there are plenty of other side effects...., but if I remember rightly you have no womb, you have had a hysterectomy? In surgical menopause you would be given oestrogen which you have in the gel why would you be taking utrogestan? There is no need for it as you have no womb lining that could thicken?