Has anyone ever had this problem? I have always had a very regular menstrual cycle since I was 11. 7 day period every 3 weeks on the dot. Last month my period lasted only one day this month one day or really about one hour. I have been dizzy headed also. I do have children, so I know the signs of pregnancy, and have read this could be implantation bleeding, but have never experienced this before. I will get a pregnancy test, just thought I would ask if anyone else has had this happen, and am I jumping the gun with buying a pregnancy test? Thanks-