Every app I use needs to be forced closed after less than 5 minutes. Even apps I haven't even opened [before]. I've turned off my phone and restarted it multiple times and nothing seems to work. Does this mean I have to do a factory reset?
This sounds like a file permissions issue on the data directory.
The only fix would be to wipe, however if rooted and/or have a custom recovery, you should first try the fix permissions option.
Otherwise, you will have to do a factory reset.