Dissapearing Emails

Hello Zoho Group, I am having issues with my email. When I opened my email last night to check on some work, my inbox was empty and all my emails from sept 3 onwards just dissapeared? There is also 1 unread email showing but I cannot even find it? What is going on here? Although, if i search a certain message, it will show. I am very confused here. Please help. Thank you. Vincent