We went to a speech therapist (public system so it was free) with DD when she was 3 as she only had maybe 20 words. They did some sessions with her, and then DH did a program called the Hanen Program which taught parents how to get their child to speak. Nearly a year on she has improved out of sight. They don't consider a child has a problem until they are 3, so at under 2, I really wouldn't worry about speech.