He feels the Pressure

Hi Glow, please help. My husband never has issues with getting an erection or staying erect throughout, however Tuesday morning I Peed on a ovulation test that said I was Good to go, we were both so excited and then when we got down to it he clearly felt the pressure and couldn't get hard, I think that mentally pushed him over the edge so he built it up so bad he hasn't been able to get hard for over 24 hours now so frustrating for him and for me as I am literally missing out on my fertile gap now. Any advise would be appreciate thank you