Does Delayed Menstrual Cycle Causes Cramping?

I have had cramping in my stomach for about 2/3 weeks now that comes and goes but it is really draining me. My period is 14 days late however i have been told i have pcos which could be the reason for the missed period. I done a pregnancy test but it was negative, what else could these stomach pains be there are in my lover stomach but i feel really bloated and it feels like my stomach is pushing out.