mac doesnt boot after single user mode
If the fsck modified the filesystem, it may have corrected damage to the file system by deleting a file needed to boot.

If you can get professional troubleshooting assistance, I would do that since without a backup, you'd hate to make the problem worse.

Trying to fix a filesystem or writing new files to it will over-write space that could have files that you need to recover, so you'll want to shut down the computer and make a decision:


Are you willing to proceed without trying to recover the files you need?
Is it better to get a quote for data-recovery and learn more about the problem than it is to try to fix this now.


Good luck - I hate to be in this situation (either as the one giving advice or the one needing advice), but it's a problem that many have overcome, so you'll just need to figure out what's most important to you and be sure you understand what the consequences of doing a step might be. In your case, fsck isn't a good tool to run if you have precious data since it is designed to save a filesystem by making it sane after errors creep in. It's not designed to save individual files that have not been backed up.