How much knowledge does your GP have about HRT? Some regimes induce a bleed.
Palpitations are common.
As oestrogen levels drop muscles may become lax = aches and pains plus the body may become dry: inside and out. Browse round, particularly the vaginal atrophy threads; make notes ;-)
As for not getting a response earlier, it will depend on where in the World a person happens to be, whether it's a weekend or Bank Holiday etc.. Hopefully some1 will be along with a reply, otherwise you can put the product names into the search box: individually: to read any threads that pop up.
let us know how you get on.