I am having period on the date like after 28days cycle but i am noticing since 3-4 months that my periods flow have reduced to 3-4 days only before i used to have till 6-7 days and since last i am also noticing that my stomach is bloating and currently i v faced heavy gastric problem due to which i cant breathe properly and i have continous shivering and weakness and i am on medication right now i got my periods this time and same only 3days flow i got. I am scared do i have some health issue.