Hi my period came late this month.. it usually comes from 26 to 28 days. last month it came 2/15 so 3/13 would make it 26 days.. it didnt come until 3/17 which is 30 days. before it came i had a slight pain in my lower right abdomen which i have never experienced before. now my period usually lasts 6 days but today 3/21 i woke up and i didnt have any bleeding but after i took a shower i had a small amount of bleeding which is wierd and the pain in my abdomen came back. could i be pregnant or is this something that just happens