Yes it is working now. When I googled the issue, I found that several people had had the same problem and some code was suggested for the functions.php file. I inserted that and retested the form and it is working correctly now.
Yes, I tested the contact form and received the auto response immediately, but the email to notify us that someone had submitted was never received so they got an email from us saying we’d be in touch, but we never knew they contacted us. We have no idea if there were actually any submissions, but on google analytics there were visits to our contact page so we don’t know how many got sent out into the ether somewhere and are waiting to hear from us.