Hi, My period was late by over a Month, when I finally got my period, it was a dark brownish black colour and clotted. It eventually changed to a dark red colour with small amounts of clotting. However, since I went over my due period date I have been feeling tired, nausea, dizzy, headaches and backaches. I was going to buy a pregnancy test but then I got my period. Could it be possible that I may be pregnant or is it just an irregular period? Please help! Thanks.