mobile

i had my phone rooted since 1-1.5 months and todays i decided to install cm12.1 ...........but after successfully flashing that AND gapps.....when i restarted my phone all my contacts were gone
!!!!!!plz help me...tried flashing the backup but after that a screen comes and messages of several apps(the pre-installed once) have stopped wworking...

PLEASE I NEED HELP!!!!!!
HELP ME ASAP!!!!!!!!!