Default [Q] Updated 4.4.2 to 4.4.3 and all apps and settings were factory reset

hi
i have a nexus 5 with carbon rom installed.
my issue is when i upgraded from 4.4.2 to 4.4.3 all my apps were gone and my settings were reset.
is this normal when you upgrade to different versions? i did wipe dalvik and cache. could this be why all my settings were gone?
thanks