Hi
sorry your feeling so bad.
I agree with what DG and CKLD are saying.
You don't say anything about your palpitations/pulse rate in the 3 months?
Has it improved? or just the same?
As for Femoston its the kindest of the prog bar Utrogestan option. The estrogen part your on is a low dose so I'd doubt if your getting too much.
The symptoms you mention could be a lot of things.
I felt unwell over christmas and it was down to me having a virus that went around our family and friends. Gave me bad headaches and sore stomach too.
Nervousness and panic attacks can also bring these symptoms on too. Especially if your worried about your heart.
Just to be on the safe side, if you are getting more light headed and dizzy spells or you fell they have got worse then it might be a best idea to head to A&E or equivalent walk in to see if they. Better to be safe on this if you feel you cant wait for an appt.
Also, don't suddenly stop taking your HRT as this could add to the symptoms and further confuse things.
Hope you feel better soon.