Hi - I Recently Had A Hyposcopy - Due To

Hi - I recently had a hyposcopy - due to a period 18 mths after menopause - it which included the removal of 2 small polyps - the consultant has found some changes but not sinister hyperplaxia? I think that's the name & ive been prescribed 'provera' 10mg x2 a day for 4mths - then a review in 6mths - as the lining of my womb needs to be thinned out & im lacking in progesterone
On reading the reviews of provera I was shocked to read the side effects - heavy periods - insomnia - constant headaches - weight gain - water retention
Being post menopausal ive gained 3 stone - suffer with insomnia - so I'm dreading the effect these tablets may have ( I'm on day 2 of taking them)
Your views & comments on this would be much appreciated - many thanks