There is no risk of clotting with transdermal oestrogen as it goes straight into the bloodstream. There's a slight risk with oral as it metabolises through the liver which produces clotting factors. Micronised progesterone is not associated with risk of clotting, unlike some of the older progestogens.
If the information you were given came from a GP or other non-specialist, ask for a referral to a menopause clinic. Most GPS are behind the times when it comes to HRT.
JP x