Hi and welcome to MM
Your story is not unusual. It is sometimes a good idea to switch to a conti HRT as you go deeper into menopause - the problem is that, with conti HRTs, you are using progesterone all the time and this can bring more headaches and low mood etc.
Also, it takes roughly 2 years after your final period for the oestrogen levels to bottom out and many women find they do need a higher dose after a time to keep meno symptoms under control. However, if your flushes are mostly under control then the dose you are on may be fine but what you are getting are more side effects from using progesterone all the time. Many women choose to stick with a sequi HRT for this reason. You are still young, so will benefit from at least 5 more years of HRT - this will protect your heart and bones for the long term. If you don't mind going back to having monthly periods and you felt good on the Femoston 1/10 or 2/10, then I would ask to go back on that. There are other alternatives but if it suited you before then it will suit you again. DG x