Hi CazaD123

Firstly what are you taking Venlafaxine for? Is it for a long term mental health condition ( you don't need to say if you don't want to!) Secondly yes it sounds like a good plan to swap the cerazette for HRT. I started HRT at your age and have never looked back - still on it 10+ years later.
It is slightly worrying that you have been feeling hot and sweaty for the last 12 years because in the absence of periods on the Cerazette you could well have been through menopause sometime ago and would really benefit from replacement oestrogen to help protect your heart and bones. Maybe you should have been offered HRT long ago rather than the Ven... if it was for menopausal symptoms?
Anyway you can remedy this now. That is a good combo (gel and utrogestan) and many women are very happy with it. The main issue can be taking utrogestan every day - gives some women side effects but some women love it (bit like the Mirena really). The other alternative is to take it cyclically (the utrogestan) and have a withdrawal bleed. Another good alternative is the Mirena coil and then you can adjust the dose of gel until you feel better. This will mean no bleeding ( except sometimes in the first few weeks as your body adjusts to getting oestrogen again). Another suggestion using the newer progestogens is Angeliq (if you've been happy taking Cerazette) which contains drospirenone.
Maybe if you get settled on HRT you can gradually come off it - the Ven... ( slowly!) if it wasn't given for a long-standing non-menopausal reason?
If you don't get on with gel there are always patches.
Hope this helps - but do ask if you need any more help

Hurdity x