Congrats on the birth of your daughter!
jaxstar - I had a fibroid show up on my 12 weeks u/s with DS. 3cm. It was about 6cm at my 20 week u/s, and close to my cervix.
OB was not worried about it at all and said there was no reason not to try labour normally. I had another check at 36 weeks, but that was more for my benefit, he wanst fussed about having it. At that scan, they couldnt find it at all, so not sure what happened there.

Its when they get to 20 and 25cm and are blocking your cervix that it might be an issue.