Keepgoing, welcome to MM!
Sorry you are having a difficult time but I'm not surprised. I think you are on the wrong type of HRT which would explain your symptoms. Firstly, prempak c is a synthetic oral HRT preparation and the dose is way too low for someone of your age. Also, oral HRT is not as effective as the transdermal variety so I'm not surprised you had problems with it.
Femseven is wrong too. It is transdermal but it contains a synthetic progestin which causes all sorts of problems for those who are either sensitive or intolerant to it and it will undermine all the good work the oestrogen does and it lowers your mood, particularly when taken for long periods of time.
I would definitely recommend you change to using transdermal, bio identical oestrogen gel or patch (I prefer the gel because it is more flexible, you can adjust the dose and I think it works better) and then to use a separate bio identical progesterone like Utrogestan, preferably vaginally, for a few days every month. This will give you a cycle again meaning periods but I think you will find it is much better at symptom control and should help lift your depression.
I've been there myself and tried lots of different HRT preparations and the best one I have found is the one I am currently using which is 2 pumps of Oestrogel every day, a tiny bead of testosterone every day and 100mg of Utrogestan (vaginally) for 7 days each month. I am severely intolerant to synthetic progesterone and also Utrogestan if taken in large quantities and this is the best regime I have found so far!
Hope that helps.