So, all of a sudden I am not rooted anymore. The root checker says I have root access but all my other apps are saying I don't. Tried to re root but no luck. Please help.
Well, you didn't specify the version of the firmware you're using, and the errors you got when you tried to re-root if it's 4.5.x.
Sony LT25i “Tsubasa”, stock, rooted, locked bootloader [Android 4.1.2 “Jelly Bean”].
Maximum speed witnessed over LTE: 98.2 Mbps down / 48.5 Mbps up; Average speed over LTE: 72.9 Mbps down / 45.7 Mbps up.
But we need to know the error message to tell if you phone is in a strange state.