The 1st fday of my LMP was 4th Sept, when I came off BC (pill) I had a bleed for 4 days but have had nothing since, I have done tests which have been negative, but not sure if would have been too early to tell. Can anybody shed any light. I have a son already and I did catch with him 3years ago in exactly the same scenario - what are the chances of doing the same again?

I would go to the doctor's. That is pretty much my only suggestion, I guess.