I can't really help you, but I'm going through the same thing. My son was 2 last week and he doesn't say anything, like mum or dad either. The only thing he will say is "Twinkle, twinkle little star". The words are as clear as a bell!! He has just had his 2 year check with the health visitor, and it didn't go too well. To be honest I thought they were very tactless with me, and I left feeling really upset. He has had a speech therapist and occupational therapist come round once. Don't really know whats going on there. And in a couple of weeks we've got a pre-school teacher coming round, she's going to come weekly. We've met her once and she seems great, so fingers crossed.
I know this doesn't really help you, but you might feel better knowing someones going through the same (I know I would!)
Hope you get all the help you need.
(I'm not 100% sure how this site works, but I've put in my Instant Messenger name and (if it works), if you want to get in contact that'd be great.)

thx for your comments and sharing your stories. I really appreciate it and it does make me feel better knowing that Im not the only worried mom out there. I just tend to worry too much i want everything for my little girl and what parent wouldn't. I think I am going to put her in daycare soon and perhaps that may change things..and that is something else that bothers me as well but that's an other post hehehehe...i will keep ya posted.