Thanks Bjrose I had a rough idea about where he should be for his age but that made it a lot clearer.
I think i'll talk to the nurse about waiting a few more months, maybe untill he's 2 1/2 and see if there is an improvement. Its only been the last few months that he's started to make more sounds and try more words so maybe he just needs a little longer. In the mean time i'll keep encouraging him to use his words and encourage him to express himself verbally more.
I guess everyone is different and every mum has at least one concern about their child, whether it be talking,walking, food issues etc so i know i'm not alone
Talking it through on here has really helped so thanks everyone for your advice/comments