I can't express how my levels of anxiety grow a few days before my period starts. 
All my muscles are tense, I can't eat like I would like to, I have a constant fear of fainting. 
I noticed my speech is affected too by my mental health and sometimes I can't talk as good as I talk when I feel ok. 
I have an afternoon shift at work and spent all morning (yesterday and today) trying to control my breath/heartbeat. 
I just wish there was a button to press to stop all of this.