ok well usually, about 2 days before my period starts i have diarrhea for a day. However i havent been eating properly for a while, dont worry i DO eat, but i only eat dinner. And this time im kinda feeling more constipated. Also my period is now 4 days late and my cycle has been a regular 26 day cycle for 3 years now. so my question is, why do i get diarrhea before my period and does not eating affect it? i've been getting the normal, pms, cramps, tender breasts and a few days ago my discharge smelt like my period but why do i not have it yet. also im 15 years old if thats relevant. thanks so much <3