Let's try to repair your outlook.pst file using Scanpst.exe, aka Inbox Repair tool, in case ScanPST is not able to get back .pst file, then your corruption is complicated and you may try to use https://www.repairto...r-pst-file.html Outlook Repair Toolbox
As an additional information about methods .pst recovery, take a look at next articles/threads, where experienced users give various methods of solving .pst issues
Microsoft Outlook Inbox Repair Tool
Exit Outlook. Press "Windows-E" to open File Explorer and then navigate to "C:\Program Files\Microsoft Office\Office 15\" for a 32-bit version or "C:\Program Files (x86)\Microsoft Office\Office 15\" for 64-bit. Double-click "scanpst.exe. Click the "Browse…" button and then select the PST file you wish to repair. The default PST locations are "C:\Users\<USERNAME>\AppData\Local\Microsoft\Outlook" or " "C:\Users\<USERNAME>\Roaming\Local\Microsoft\Outlook" where <USERNAME> is replaced by your Windows username. Click the "Start" button to scan your PST file. If the Inbox Repair Tool finds errors in your PST file, then you will be prompted to repair the file. Click the "Repair" button to repair your PST file.