[HELP] [NEWBIE] Lost Wifi Connection in Kali 2.0

Hi everyone, this is my first post. I love hacking (after seeing Mr. Robot of course xD) but i'm new to this, actually i know nothing about and just started installing Kali 2.0 couple of days ago. I started messing up with some airmon-ng and aircrack commands. At first i type in "airmon-ng kill check" then it said it killed something i didn't remember, then after a couple of failed attempts on cracking WPA, i quit the Terminal and i started suffering web normally but then i realize that somehow my wifi cannot connect ??? try many ways online to fix but still no hope....then i messed up again with typing "iw del wlan0mon" or "iw del wlan0" (not quite sure remember) then i don't see the Wifi option anyone... TT.TT in airmon-ng it also showed nothing (not even wlan0 or something, just blank)....So is there anyway for me to reset my Wifi state on my device, i mean reset everything back to normal, please help me, i'm new to this and i don't have much knowledge. Any help would be very appreciated. Thanks !!!!