DD1 was similar and we saw a speech path for an assesment. The speechie said she was a bit behind for her age but she thought she was on the verge of speaking at the level she should be soon, 6 weeks later she also had a huge word vomit (thanks helle! love it) and hasn't shut up since. If you are worried see if daycare can arrange an assessment, best case scenarios either way -if there is a problem she can get early intervention, if there is no problem you get reassured and she has some fun one on one play time with an adult that is around kids day in day out