DS is 13 months. I was on the mini pill but its main effect seemed to be to make me not feel like sex so on the rare occasions of sex DH and I have been using condoms.
My last period started 16th December and my cycles have been between 25 and 28 days (periods restarted at end of September). On 23rd December we got a bit carried away and didn't use a condom (we both discussed it and felt like throwing caution to the winds).
Was just looking at the babycentre ovulation calender and if this month's cycle is 25 days then I could well have been fertile around the critical date. And the fact I was "in the mood" for it might suggest that as well.
I wouldn't mind having another baby; it's just that DS is becoming so much more his own person and I'd like to keep that for a while, without having someone else to share it.
Oh well, maybe period will start in the next week or so. If not then I suppose I'll test some time. Feel bad that there are people desparate to have a baby and DH and I may have created one accidentally.