Not sure what happened to your game. Make sure you are playing on the latest game version with the latest os version, and avoid sync errors - see Chapter What can I do to resolve my game issue? in Main Guide. If all else fails, report in Bugs and Issues forum for further assistance.
I regularly housekeep my device, game and wifi so I don't get much issue with my farm. Housekeeping may seem like a chore to some players but I strongly encourage it to avoid hassle or hiccups.