I have a Galaxy s4, I changed my pin passcode and used ADMbut it stil won't work

I recently changed my pin passcode on my phone, locked it, then tried the code and it unlocked it, so I relocked it. Ten minutes later I tried to unlock it ms it said the passcode was incorrect. I tried numerous times. I looked online, and I tried the android device manager. I locked it once, tried the passcode and it didn't work. I tried it on another android device ms still no success. I really need to find a wayp to get my phone unlocked, it has extremely important information on it. Is there any way to fix this without having to reset it to the factory settings?