Getting him in the mood?

Mari • Hi! I`m a designer, blogger, mom, and shiny object addict.
I thought my hubs was always ready for sex but now that we're ttc our 2nd (and trying hard, like every night Glow is green) he suddenly has problems performing!
​I have no idea how to help cuz this has NEVER been a problem before, LOL. Any advice?
Maybe we're just too stressed.