Estradiol gives me a headache when I use vagifem. I'm ok with the patches unless they are increased.
So what you've described strongly suggests a response to the oestrogen you started, or a sudden drop in oestrogen from not absorbing it as you thought.
How are you getting on now?
The breathlessness, does it happen on exertion or at rest? I went privately to a cardiologist for lots of weird heart symptoms (not saying you have that, but they calmed down on evorel sequi, so the whole thing was peri and a number of years wasted with doctors telling me I had anxiety), all was normal, but I suppose I'm just wondering if you need a specialist check, if no other reason than to put your mind at rest.