Jam Ignore the gnome! He's just a pita and nothing but a bad influence in these uncertain times! X
Ever really sorry to hear you're having such a tough time at the moment. I'm completely with LovelyFishy on how to manage a hopeful/positive balance in life.
For me, I was absolutely dead certain for years that I never wanted children - for various (often barmy) reasons, including (but not limited to) the environment, the future of the world, my ability to provide for kids financially, my ability to provide for myself financially, and my mental stability and suitability as a parent (I've struggled with depression and anxiety in the past, and it freaked me out to think of that happening again if I were a parent). Then a couple of years ago I changed my mind, and decided I could manage all of those things, because the positive aspects of raising children massively outweigh all of those negatives. And after much planning and delaying, finally we began TTC at the end of last year.
But as it's become clear to me that making babies isn't actually as easy as it looks, and that there's still a strong chance that we won't manage it, I've had to reconsider my previous stance. I was always 100% happy at the prospect of spending the rest of my life together with my DH, as there are so many things that we would likely only achieve together if we don't have kids. Essentially, we all have two possible life paths ahead of us, both of which are equally full of potential, just different. I know that we can have a totally fulfilling life either way, so mostly I try not to worry.
In practice, at the moment, as we're still a bit new to the game of TTC, during the TWW I can still let my hopes get up to a silly level, and that's not cool. I wish I could be more zen about it. But already this month I feel a lot more chilled about the whole process than I did at the beginning, and I just keep reminding myself of all the cool things we can do together (places we can go, houses we can live, creative projects I can achieve with more time) if we don't have children in life.
Again, sorry for the long post. I just got all deep on you all 
Lastly, Canters I just wanted to high five you on your mountain-hot tub-sex! Sounds amazing - quite jealous now 