We had the same issue with our son, who is now 4. As a teacher, I knew something was up, but everyone kept telling me not to worry about it.
Any child under the age of 3 is eligible to be tested for delays (including language). My Eli was tested around age 2 and then we entered the Babies Can't Wait program. Early intervention is essential, so I strongly recommend contacting your county to get her tested. It is an easy thing. You and your child are in a room with a bunch of professionals and they play games with her while they make observations. Once qualified, you are eligible to receive speech therapy services free or at a greatly reduced rate. We paid next to nothing and our therapist was normally $180/ hour!!
Once she turns 3, she can be tested by the local school system (again, free of charge) to see if she qualifies for the special need pre-K. (They can be in there at age 3) Eli is now in the special needs preschool and is a completely different child! Since August, he has grown so much and we are very proud of him! The special needs classes are incredibly small, so they get lots of individual attention. Eli has 4 kids in his class and there are 2 full time teachers, a speech therapist AND an aide.
You can go to a developmental pediatrician, but, there are only 2 or 3 in Atlanta and they do not accept insurance. You go on a waiting list and then pay around $1500 to be tested. From a friend who took her autistic daughter, they are great, but that might not be your first choice. Try the free testing and programs offered by the couny in which you live.
There is help out there for you! :)