Thanks everyone for your replies!!!
So we couldn't stop worrying and went in for an ultrasound Friday and there was only one baby. There was not an excess of water either. There was a big fibroid, which the woman doing the ultrasound said could account for measuring large, and she also said it is nothing to worry about. The baby measured right on for our dates. It was so cute too, we saw the baby open its mouth three or four times, once even sticking out its tongue!
At least now we are not worried! I was relieved yet a little sad not to be joining the parents of multiples club - it would have been a mixed blessing though! I feel I barely survived the newborn stage of my first and am hopeful but worried about the second. Not sure if I could have survived twins.
Rockin' mama to Allison (9), Asher (5) and Alethea (3), head over heels in love with my sexy husband, Tony.