Hi Joannie10 - As you have had a hysterectomy, it's not about which HRT so much, as you only need oestrogen, but it's about ‘how' the oestrogen is delivered for maximum benefit. You have only tried oral pills and you may absorb the oestrogen better with either Gel or patch - as Annie has already suggested. You should probably try Oestrogel as this allows flexibility regarding dosage - so you can start low (say one pump per day) and gradually increase till you find the daily amount that reduces the flushes etc. You may also be someone who needs some Testosterone - you would probably need to seek specialist advice about this as it isn't usually available on the NHS.
Try printing off the info from this site under TREATMENTS( Oestrogen section) to show your GP - it can help when discussing things. DG x