implantation bleeding question
How soon - or late - can implantation bleeding occur? I had sex on Wed, and then on Friday night I got a smear of blood, followed by really light clearish-pink spotting yesterday. I had cramps like I was going to start my period, but that alarmed me cos I'm not due for it till next Sunday the 26th. Today - Sunday - I have nothing and the cramps have disappeared. If my calculations are right, I wouldn't have been ovulating at the time I had sex, so conception doesn't seem possible. BUT! my period was a week early last month, so who knows when I could be ovulating right?
I hate to say that I don't want to be pregnant cos I know so many women on here are trying. But I'm really scared. To top it off, I spotted the guy that I'm involved with, out with another girl last night. I am devestated. I don't know what I would do if I had to tell him I was pregnant.
Should I be worried?