big poblems,help

i was flashing to stock and on the nexus root tool kit and now the only thing my nexus does is boot to start,bootloader,i think recovery,but i did the unthinkable and wiped sd card i guess,and its stuck on the google screen,with the unlock icon,how do i gt to stock,or stock rooted,ive messed with it alday and just cant gt anywhere,ill b up til 3/4 am if any nightowls are out n about,plz anyone help,ty very much guys/girls

 

thank you for the advice,i tried alnight to fix it,but it jus stuck on the google screen,and i gv up,til this morning and i guess the nexus god helped out lol,not sure what i did differently but the wugfresh worked,the main issue was it wouldnt see the adb ,dont ask how i did it,but im going to try to remember to post for others that run into the same problem,but i do ty very much for your advice,one more thing,i read somewhere when flashing a rom,dont delete sd card data or something like that,and i believe thats what i did and erased everything,so if anyone could explain alil more on that issue plz.sorry to write so much ty all again