I have a son and a daughter aged 1 and 2. A week ago (midcycle) we had an incident where a condom split but, thankfully, we discovered it before ejaculation. I don't know how long it had been split, but it must have been a few minutes before we discovered it. My period is due on Sunday and for the last week I have felt very, very sick and unable to sleep at night - my mind is all over the place, and I can't shut down. I had these exact same symptoms between conception and when my period was due during my last two (planned) pregnancies. The thought of another one now scares me - I would have a 3, 2 and a 1 year old after a year!!! Talk about close together! How likely is a pregnancy under these circumstances?