elainewin, your HRT contains norethisterone, a synthetic progestin, which would probably explain why you have reacted badly to it.
I can't take norethisterone at all and for me it causes silent migraines so perhaps in your case it causes extreme mood swings. You have obviously given the Climagest a fair trial so perhaps now is the time to think about changing to a different HRT.
My suggestion would be to go onto a transdermal oestrogen (patches or gel) and then take Utrogestan vaginally for a few days every month. Utrogestan a bio identical progesterone is far better when taken vaginally because it works better, i.e. more of it reaches the womb, and also it has fewer side effects when taken in this way.
Having been around the block on this one and tried many different types of HRT, this is the regime I would personally recommend.