Hi Gaynoranne

I would suggest changing to a different type of HRT. The one you are on gives continuous progestogen - the synthetic norethisterone - which is notorious for causing pms type problems for some women. Also it could be that you need a higher dose of oestrogen than you are getting from the Evorel.
In your position I would go for a separate oestrogen and progesterone. Oestrogen patches come in different strengths so you could graudally increase a little and see if that helped.
Is there any reason not to try a cycle again - re your ablation? If not then I would just start this for a few cycles ( not sure if you would then get a bleed?) - then you would know whether the progestogen was causing the pms symptoms.
I recommend Utrogestan which is bio-identical to our own progesterone, so less likely to cause side effects that you wouldn't normally get in the natural cycle, and if you are lucky, then nothing negative either.
All the different types of HRT are in the green menu on the left under HRT preparations
Hope this helps!
Hurdity