File system messed up topic

Hi guys,

I had installed TWRP recovery and I pressed fix file permissions and when I rebooted it messed up my phone, deleting Google Now Launcher, and I cant open playstore anymore, I tried flashing the stock android 5.0.1 recovery again but that didn't work, should I flash android 5.0.1 again but without the ''-w'' parameter?
Thanks in advance :D

EDIT: I lost more apps like Whatsapp, Chrome is also gone why did I press that button for gods sake....