Hi chezzym - what brand are they and do you have to take a combi-patch at some point with the progestogen to protect your womb lining?
Adding oestrogen as you are doing should even out the mood swings to some extent ie will prevent your estradiol levels from dropping too low, but it won't stop your own cycle and fluctuations in progesterone will also contribute to mood swings and in irritability particular. HRT should help though!
Hurdity x