I wouldn't have thought 2cm was massive. The one I had removed in 2004 was 13cm! I have others now and I know some are bigger than 2cm and my FS is not worried.
I think the clincher is the position of the fibroid and/or whether it is causing any issues like bleeding. It's great that you know about it and you can do something about it. Being small it is hopefully straightforward to remove too.