Two year check up!

Koco will be going for his annual check up in a couple of weeks. And I have my list ready. I'm worried somtimes that I'm doing things right or that he's behind. But as much as other's don't believe me, he can do it. He's a genius sometimes, the things that he know and can do. But it is the talking that worries me. Right now he can say:
Ball
Juice
uh-oh
oooh
owww
go
stop
Dada
Daddy (that's me by the way)
Brother
Brother love
What's that?
See it
Sit
shoe
sock
shirt
s&it
f*ck (bad mommy, how did he learn that)
Dog
He says a lot of other things that I don't quite understand but other times he'll say something just once and you've got to catch it or he'll never say it again. Like:
What are you doing?
Your silly
It seems everyday there's something new I know I'm forgetting some words he can say but I know this list is far from the 60 words they say he should be able to say. It's not that I think there is really something wrong although other people do I just think I need to be taught how to work with him more. There's nothing wrong with his hearing I think he's just head strong. It could be because my husband and I are both the same way. We're all three Tauruses. But it breaks my heart when other people tell me there's something wrong, I know my son and I'm not in denial. He was behind in certain areas all his life. Such as walking, the Dr said by 15 months we should worry so we waited and worked with him. He finally did it like the day before his 15 month check-up and then that was it he never stopped. He just needs to be worked with I think and then he'll catch up in no time.