I am about 4 days late on my period, and I am NEVER late. The only other time I was late was when I was pregnant with my daughter. I have taken tests but they have all come up negative. I'm thinking I might have conceived only about 2 weeks ago. So I'm pretty sure I'm pregnant and was just going to wait until next week to take another test. But about 30 minutes ago I got very very light bleeding. It was pink and was a little more than just spotting. My period never starts out like that and the bleeding has stopped. Could that have been implantation bleeding?