How to take the pressure off hubby

So we've been TTC for 9 months or so now. I found out I have pcos which was while I was having irregular periods and I wasn't ovulating. I finally had a cycle induced with medication and took 100mg clomid. I'm on cd 14 and had a positive opk yesterday! But, my husband is feeling so much pressure and we've tried to BD the last two days and he hasn't been able to finish 😩 idk what to do! I haven't even talked to him about my OPKs or anything, so he doesn't know I'm really seriously ovulating right now. I'm having the cramping and everything today. We BD 4 days ago which was technically in the fertile window but I feel like we NEED to BD today to have a shot at pregnancy this month. But I don't know what to do. He's been the one initiating it but he said his body just locks up and he feels like he isn't going to be able to finish and it gets in his mind that he has to or I'll be upset and then he just can't. What do I do?? I'm so afraid to try again today without success. It's hard for the frustration to not show on my face when he tells me he just can't. Months of stressing over TTC and now we actually COULD conceive and sex is the problem! 😢 Any advice?? I know "just keep things exciting" " don't talk about ovulation to him@ but I swear that's what I'm already doing. This is all in his own mind.