lack of speech from 22 month old... should i worry?

Fiona

my son as very limited speech but a great understanding. I'm waiting to hear from a health visitor as I've just moved areas, but would like to see how he compares to more than just my group of friends.

he can make noises of your common animals and car noises. he has said apple and Nana(banana) a few times, ball, no, go, oh! when he does something he knows he shouldn't or if he sees something happening on TV...other than this nothing else.

he has perfect understanding and will get a plate from the cupboard if I' ask when making his din we, he will get hibs shoes, jacket etc, he'll try put them on, he snores when you say it's bed time,

would you say he is behind and I should be worried, or do you think it is 'normal'

thanks