I'm married, have regular unprotected sex with hubby - we have a little one under one so at the mo we're not actively trying. I was due to have my period last week (usually it lasts for 5-7 days quite heavy, clotting, very painful cramping etc - always have been like that) but instead it was so light, some cramping and only there about 3 days. I've been queasy, nauseous, etc. I did a pregnancy test today and it was not pregnant. Could it have been implantation bleeding and I have to wait a few days to do an accurate test?