Since your drive was ejected improperly, this might have caused damage to the file system where the index of your data is stored on your hard drive. Our best recommendation is to stop what you are doing and immediately bring your drive in for a free diagnosis.
Attempting to “repair” a damaged file system is not something you should try doing on your own. Data Recovery professionals will always “clone” the drive first, then work with a clone to rebuild the file system. This is the only safe way to ensure safe recovery of the data on the drive.