I wouldn't let it rule your life once the oestrogen starts to take affect, you can decide for yourself when to use the treatment.
No one told me what time of day to use Vagifem and Estriol and I have got into the habit of using every morning because that's what suits me.
Its for life and its good you are starting the treatment early as it can come as a shock to those of us who reached a great age and didn't know what on earth was going on down there.