Why do i usually feel gerd symptoms, acid reflux,breathless week or days before my period? is it hormones

Possibly: If it's at the exact same time in your cycle, then the answer is probably, yes. However, acid reflux isn't typically associated with menstrual cycles. Having said that, progesterone, which is high right before one's period can cause increased slowness in the GI tract, which can lead to acid reflux. As far as breathlessness is concerned, I would make sure with doctor that you don't have asthma