So last week I thought I had a UTI...i had stomach pains and it would burn when peeing. I went to the Dr. and they said that i didn't have a uti. so since then i have been nauseous..tired..a little crampy. and my period came just one day late which was weird because im on the pill and it comes the same day every time. but this month it has been VERY light bleeding, no clots and light/ mild cramps which is not normal for me. Any ideas??