Thanks Sally.
Hmm, still confused. I went to my GP today and she said that it would actually be very likely that it was my period and that I am ovulating again due to the fact that ds sleeps right through the night for 11-12 hours so there are no night feeds what so ever. (We have had one night in the last 8 weeks that he has woken during the night).
As soon as I told her how much he sleeps my gp said "right, we need to discuss contraception then", and that was before I told her about my maybe period.
I guess I will just wait and see....