Hi Spiderley,
Whilst I am not experienced enough in knowing if it's too much or too little a dose, I am very much aware my anxiety and moods dip scarily bad when my period should be due like you I am on the mirena so don't bleed but still get pms \pmdd symptoms. These can get much worse during peri. I have just been advised to increase to 100,to try to trick my body into not ovulating and so attempt to avoid the awful scary mood swings and anxiety I get prior to 'period'.
I would definitely mention your own anxiety seems to worsen like this on your review, especially as you are keeping a diary and note the anxiety is already that point in your cycle (even without a bleed )
I have also been advised I could take anti anxiety medication, on the days leading up to this time in my cycle, as I don't want full time medication for my own self.
I would suggest you make some simple note, like pointers really, prior to you appt, so that you are able to cover all your questions or ask the Advice you need. It is so very easy to waffle on ( as I can do!) and not cover you essential points.
Start with your worse symotom, which seems to be cyclical anxiety to ensure you cover this part thoroughly.
But don't forget any other question you have either.
Hope someone jumps in with some clearer advice to help you
I wish you well x