Thanks heaps Karina, Shell, Saram & Ozziehoffy for your replies. It makes me feel a bit better than my Sam isnt the only one out there going thru this!
Just an update though, since the few last rough nights he has been heaps better, sleeping thru like he used to....
Also, Sam crawled last night!! I was so excited, I think he was too, he has been trying for SOOOO long, although he gets up on all fours and then pushes off with his feet and shuffles forward. Anyway its good enough for me, so I'm telling everyone he's crawling LOL, and of course Joe isnt here to see it! I knew he'd crawl once Joe went away!!