Is he stressed about having a baby or does he really not want one?

I need some help! My BF and I started ttc this year. I'm 42 and he's 46, so the clock is a tickin'. Well, lately he hasn't been able to "complete" the performance, not all the time, but it's becoming more frequent and tonight he lost his erection as soon as we started. I know this is TMI, but I'm starting to feel like he's not attracted to me or is really afraid of having a baby. I have tried to remove anything pregnancy related in hopes it would eliminate some stress. I will say he did lose his father a month ago and we're going to the memorial service this weekend. He's also been under stress at work, but he always is and it's never been a problem before. So, is this just bad timing or do we have an issue? I'm worried😟