Crazy serious bloat

Almost every month I get serious PMS  and period bloat. Ranging from 3 days to a week I am so bloated from a mix of things that I look and feel 5-6 months pregnant. I look like I've gained 10-15 lbs in my stomach. I can't wear normal clothes. I cant suck in my stomach. I cannot wear fitted pants. My rings hardly fit and are even sometimes painful to wear. When it's really bad and people think I'm pregnant they offer me seats on the subway!!!
Does anyone else get this? I don't know if it's an actual medical condition if you have extreme bloat. 
Is there anything other than water pills that will help or even prevent this?