Hi Pepsi!
Sorry to hear you are feeling worse having just started the Elleste - it often takes a few weeks to settle down on a particular HRT and for your body to get used to getting additional hormones externally.
When you say your periods have become erratic - do you mean the bleeeding or the cycle length or both? Do they come more often or do they come late, or perhaps you have skipped the odd one?
You mention depression and other medication - some of these (meds) also help with hot flushes and for women like this (ie who don't get flushes because of taking some anti-depressants) it is not always obvious to them or their doctors that their other symptoms (mood swings or low mood, fatigue etc) are due to menopause. However at your age and with your cycle changes then even in the absence of flushes and sweats ( you didn't mention these) any new symptoms are likely to be hormonal.
The good news is that for most women HRT will help - although sometimes you do need to try a few before settling on one that suits you. Some women just try one type for 3 months - get side effects and give up for ever saying "HRT is rubbish"!!!!
You may find that the HRT stabilises your cycle and you should most likely get a withdrawal bleed towards the end of or just after the combi pills ( the second lot in the packet), but sometimes your own hormones break through so you get a bit of bleeding at the "wrong" time too.
As Salad says - "hang in there" and hope it works for you soon

. Do keep us updated....
Hurdity x