Husband can't perform under pressure

DH and I have been trying for several months, almost 2 years now, and I've recently been placed on Clomid. We've been trying to BD every other day but lately my husband has been really affected by the pressure of TTC. A few times now, he's been unable to perform resulting in unsuccessful BD'ing. I love my husband, and I feel terrible for him, but  I'm at a loss because we've been trying for so long. Now I feel like it's never going to happen, especially with this new problem. Advice? Ideas? Anything is appreciated! 😢