Okay, if you are sure there is no custom recovery, then the OTA update should not have hurt you. You should be able to perform a "factory reset/ wipe data" and "wipe cache" from the recovery menu, and your phone should then boot. OTA really only causes brick with a custom recovery. I don't think your phone is bricked at all.
You're 100% sure it's stock recovery, right?
You only have 4 menu options in your recovery, right? the third and forth options are the ones to wipe data and wipe cache. use the volume buttons to move down, and select each of them with the menu key.