Hi Mima, welcome to the forum. You are young for meno so it makes sense to use hrt.
Can only echo what other have said, it takes time to settle, I'm 44 and been on hrt for surgical meno for around 7 weeks.
Mine has helped most of my symptoms but I have accepted thats prob as good as its going to be and i just have to get on with it.
Are your symptoms really bad?