yes i had a miscarriage without knowing it. it is called a missed miscarriage.i saw my babies heartbeat at 8 1/2 weeks. everything looked great. 3 weeks later at a later us and i found out it had passed. i had no symptoms of a miscarriage at all. no cramping ,spotting nothing. yes it is possible.
Thought so...THANKS for responding to my question!!! :)
With my first miscarriage a friend asked if I would have even known if I was pregnant other than the fact that I took a HPT that came back positive... I was offended at her question at first -but really- I'm not sure I would have know if I hadn't been TTC... So the short answer is - yes, it is possible to have a VERY early miscarriage and not have known you were pregnant.