Difficult - like many medications it really is Trial and Error. What were you hoping to achieve, as HRT doesn't 'cure' everything, rather it can make symptoms more manageable.
Also it does depend on where in peri-menopause you are …… because your hormones will still be active so can 'fight' against medication. I would go with the Consultants suggestion if side-effects aren't too horrendous - the body doesn't get where it is suddenly so will take a while/months to level out.
If I have medication that doesn't give me nausea then I try to stick with it
I'm sure that someone else will be along too!