Help Husband with First Time Homebuyer Anxiety

I thought I prepared him. We've been reading this sub together for a few years now and he read all the first time home buyer books with me. I even told him the day of closing when we did the final walkthrough and saw the house empty that while we have our current list of fixes, we will find more things as we start moving stuff in, it will be ok. We are on day three after closing and he's driving me nuts. I'm pretty sure he hates the house. I'm thrilled with our purchase so far. The house is perfect for us and it's perfectly livable. Sure there are some things we will need to get checked in the next year or two but over all it's fine. We've spent the last three days doing small repairs that we noticed during all of our walkthroughs. Then the toilet handle broke which was not expected, and you would have thought the house burnt down with the way my husband responded to it. We fixed it in 10 minutes. I've stopped pointing out anything I think we should fix or change eventually. Because when I do he does this big sigh like "here we go..we bought a lemon." Changing the locks too longer than he expected and we had an issue with the front door after we had it propped open to move things in. All have been fixed and are working fine now. His parents were here to help us move stuff and fix things and I don't know if that made it worse because of course they would point out things we maybe didn't notice. But his parents liked the house. They approve of our purchase. They left yesterday and I thought it would be better. But he just keeps pacing the house looking for things to do and it's going to drive me insane. I didn't think he'd act like this I thought we were on the same page with this. I was trying to calm him down this morning before I went to work and I'm like "We have the rest of our lives in this house to fix things. We don't have to do all of them right now." I don't think it helps that I was only able to get Monday off this week for the closing so I haven't been home to help him or his parents with things. It's not even about the money either, we have plenty of savings left if something big happens. I understand it was a big purchase and big life change but I'm just so shocked by his response to everything. I don't know what else to do to reassure him that this was a good decision.