How do you stop thinking about ttc

Jacqueline • Had 3mc's and 2 mmc's, finally had our rainbow baby 14 September 2016, now trying again for number2
Everybody says to just stop thinking about it and it will happen, but how? If it's all you want, I have been ttc for almost 2years, had a mc and 2mmc's. I really wanna be a mom, it's hard not to think about it, so how can I stop thinking about it and just let it happen? I'm so tired of trying and feeling like a failure 😢any advice?