Thanks for posting here in the Community space. We know the importance of your data inside QuickBooks. Let us route you to the support that can help you with this.
Upon reading your post, it appears all your data went missing a week ago. We know how essential it is to fix this concern at ease. With this, you may contact our Intuit Developer team to help you investigate this matter thoroughly.
Once the issue is fixed, you may back up some of your data to have a save point for your accounting details using QBO Advance: Back up and restore your QuickBooks Online Advanced Company.
Let us know if you have further questions regarding your missing data in QBO. We're here to assist. Keep safe!