Hi chichi,
I am sorry you are feeling anxious. I have had depression/anxiety for about 15 years. I take 200mg zoloft per day and xanax .25mg as needed. I am 46 and have found that the closer I am to menapause the more I am having anxiety. I can't say your increase anxiety is from your period but I know mine is. I suggest that you start writing down your feelings, what you have ate, amount of exercise, and then the day you start you period. This is documentation that you can take to your physician for proof of the increased anxiety. And that will help ease your mind knowing that you can correlate the increase anxiety to your period. I hope this helps you somehow.
Snow