Could also be that you geared up to O then didn't and you will start seeing signs again in the next few days. I had this a few times thought I had but hadn't and then a few days later all signs revved up again. Keep an eye on it you may need some more baby dancing
Hopefully :-) Did some baby dancing last night. I hate the way TTC plays with your head. I swear I'm needing to pee more the last two days and my tummy feels "different". Power of the mind hey :-/