Thanks to everyone for your responses. After thinking about your comments I think it could be a combination of bad dreams and probably needing to drop a nap during the day. Athough having said that my husband is in his room rocking him as we speak to try to get him to sleep and I can hear him gurgling and talking not sounding sleepy to me and I know he only had one nap today in the morning!
I guess like eveything else this too shall pass!
Thanks so much for your posts it helps so much to know that others have gone through similar things and come out the other end!
:-)