Yesterday I was trying to update my Nexus 5 from 4.4.2 to 4.4.3. It rebooted me into CWM recovery and asked me to install the .zip to update. It finished successfully, but then it asked me something upon rebooting about fixing root that I had not seen before. I clicked "Go Back" but when I did it shut down and now it will not boot android (all I can see if the coloured circles forever) and when I try to enter recovery mode all I can see is an android symbol with its chest open and a red error triangle. So I have no access to android or CWM, and only to fastboot mode. Is my phone bricked or is there a fix?