Most importantly cat is fine but he is a git! 
I first asked for HRT when I was late 30s - as was bleeding all the time, though lightly. GP said I was probably peri menopausal but too young for HRT.
Nurse had prescribed me some gel for vaginal dryness but GP refused to prescribe any more...helpful.
Went back when in early 40s - again as lightly bleeding all the time - again no HRT.
Went back when 43 (ish) after a flooding incident on holiday. Said to GP (the 3rd different one) that I never wanted that to happen again and he asked if I had ever thought of HRT? I could have kissed him.
At that time I was also getting really quite violent mood swings, I've always had PMT but of the slightly snappy, bit depressed, eat carbs kind. This was different, really, really down for substantial parts of the month, crying, and really quite a horrible person.
The first HRT was, I think, one of the older ones - Prempak maybe or Premarin?
It helped with so many things (anxiety, general niceness, insomnia), and made the periods of depressive behaviour less awful but they didn't go away. Talked to GP again who said I might be finding the progesterone difficult and suggested Qlaira, which is also a contraceptive, and is marketed as a mimic of the natural cycle.
I still get a bit snappy and depressed for a couple of days a month (not very predictably as I suspect I'm getting to a stage where my hormones are all over the place) but it's much shorter duration and I feel much more stable generally.
The Qlaira worked for me, but I suspect there are lots of different hormonal factors there for every woman and a one size fits all approach isn't going to work.