I updated my MacBook Pro mid 2015 to High Sierra from Sierra. Update was successful and everything worked perfectly for nearly 6 hours. Then MBP hung and I had to hard power off since it wasn't responding for quite a while.
Now, that partition doesn't even exist. I had Boot Camp installed. Hence it automatically boots into Windows. No other drive shows up for boot options. Not even macOS recovery partition.
I made a bootable USB stick with macOS High Sierra from internet recovery, Disk Utility cannot fix it.
fsck_apfs says it is not a APFS container.
Windows lists it as HFS/HFS+.
diskutil lists - APFS container.
I need all the data on it since I had been working while the update happened which has no backup. How do I recover that partition or at least all the data in it?
Note: Drive was not encrypted with FileVault.