Exclamation [Q] Help!!! Galaxy S3 SGH-I747

Hello, im new to the android stuff.. but not that new to smartphones, i had installed 4.3 to my phone, and then installed the new kitkat 4.4 CM11 not without making a backup before with CMW, i disliked the 4.4 so i went into to restore my 4.3 backup but somehow it wasnt there, so now im stuck to 4.4 and I really wanna downgrade to 4.3 or even 4.1.2 but i have been reading around and all see is that my at&t can get "brick" and i really dont wanna get into there.. anyone can help me?

PD: Sorry if i posted in the wrong section/area of the forums.