I've always heard old wives tales that say children and animals can tell if you're pregnant before you even know. A friend of mine has a two year old, and yesterday we were all playing outside. He proceeds to walk up to me, pat my belly and say baby.  It completely caught me off guard! My Husband and I have been TTC for about 8 months now, with no luck, and I just finished AF but it was a lot lighter and shorter, so I guess it could be possible??