Thanks folks. Thought I would be a little sad, but am actually just really relieved. Life is tough enough at the moment without adding a pregnancy/baby into the mix.
Still have the same background/low-grade sadness that my pregnancy days are over, but no more than before iykwim.
RANT ALERT - please feel free to ignore ...
Almost called the assesment centre today to beg them to bring ds1's assessment forward. Things have been really bad with him over the past few days and I honestly don't know how we are going to cope until next April, which is the earliest he will reach the top of the waiting list.
Today was pretty much ok, as I let him have a pj day and chill out doing whatever he wanted and I was starting to think I was just being influenced by PMT and its not that bad. Then, at tea time I discovered he had stolen some of the sweets dh and I brought back from the wedding. I had told the boys that we would give them to them as a treat when we considered their behaviour had been good enough - hence them not having been given them for over a week!
First he lied about having done it, then he tried to tell me he did it because he thought Daddy's favour had more sweets in it than mine, so he thought that was unfair and he needed to even them up. 
Then he said it wasn't his fault as his curiousity just got the better of him and he couldn't help it.
No matter what I said, he just couldn't grasp the concept of why what he had done was wrong and he got more and more angry at being told off, until he had a full-on meltdown and had to be put on his bed for half an hour to calm down. He did however, come and say sorry afterwards, but still said he didn't understand why I was so cross.
We had a long chat about right and wrong choices and consequences for wrong choices etc and I gave him the analogy of a burglar stealing a tv, but saying it wasn't his fault as his curiosity just got the better of him. I asked him if he thought the judge/police would say he didn't have to go to prison. He said they would say he still has to go to prison, but he only took sweets and not a whole tv so its not the same thing - aaarg! Flipping literal ASD!
I also tried to point out that he has been the harshest judge of the boy in his class who is a cleptomaniac, despite the boy not being able to help it due to his hard life. Again - he couldn't see how this applied to him, because he only took sweets once and the other boy steals all the time.
He did apologise for upsetting me and eventually he did accept that he had made a wrong choice and agreed to never take anything that didn't belong to him without asking again. I'm pretty sure he still things I am in the wrong and decided to agree with me to end the discussion. But boy, what an epic. Any other child would have just taken it on the chin after a bit of a whinge/cry, not my ds1 - the rules don't apply to him - apparently.