I need help!

[TkSilver]

Not unless you have physically made a backup by copying the savestate folder saves to a different location on your device (PC, phone, tablet, whereever you play drastic). The only other way is hopefully your brother made an ingame save (not a savestate) not too far back from the save state you messed up and he can play from there. If you are on a personal computer the most drastic aolution would be to do a whole computer system restore (assuming you have this turned on) to a date hopefully very close to todays date. If this is not your own personal computer do not do this with out the express permission of the owner of the computer, a lost game save is a lot less of an issue then doing a restore point to someone elses computer.

This is a good lesson to always make backups of important things because some things you do electronically can not be undone.