I haven't kept up with this thread at all. Without meaning to be rude, I just didn't have time to keep up with new posters (I'm sure you all understand).
We didn't try this month - I know when I ovulated, but chickened out. I'm still undecided, and knew it wasn't wise when I'm so unsure.
I'm thinking of booking a holiday for next Summer and forgetting about a 4th completely. I know that I'd have that to look forward to, and that it would mean I couldn't ttc as that would coincide with due date.
Dh I think was a bit relieved that I didn't want to this month, after assuring me he did want another, so I think we are both on the same page.
I think for me it was DS turning 4, starting school etc, that triggered feelings in me of wanting a baby and letting go of his younger years. I know that's not a wise reason to have a baby 
I've started to focus on the positives of him getting older now, and what that means for our family. Like you too everythingnow I also have some issues with my teen dd - nothing worrying or serious, just general teenage stuff and don't feel that a baby is the right thing for us.
I know that if we don't don't go for it now, that's it, we won't try again in the future. I'm 35 now, which isn't old by any means, but as I had my kids so young, I don't want to be 40 and still have a baby or a toddler in the house.
Sorry, that seemed like an essay all about me. The reason I'm posting is to say to Schnitzel that I saw your post on my watched posts and am thinking of you. I will cross everything for you. Please let us know how everything is and how you are. Xx