Hi Jules
Unfortunately HRT is not a quick fix and 2 weeks is not going to be long enough to show much improvements. Speaking from personal experience, it takes 4 - 6 weeks for improvements to start and then further improvements follow for a further 6 weeks. Between 3 and 6 months on the right dose and type of hrt you should reach a state where your body is comfortable on the hrt and the oestrogen levels are at the right level for you. I found this very difficult as a good friend of mine went on hrt and was better after a few days. For me it was a lot longer.
Yes, low oestrogen can cause anxiety. There are oestrogen receptors all over the body, including the brain and it is low or fluctuating oestrogen which causes the anxiety. Although, there will be some ladies who suffer with it when oestrogen is high.
You have got to be patient and continue with the regime . Again , I speak from experience. If you look at some of my early posts you will see how desperate I was. I've been where you are now xx