We were froze for almost 2 weeks. Did everything you did, plus heat tape on the spigot. Our spigot was frozen solid. Finally got it back yesterday. Thank the Lord! I'm too scared to do the water drip.
My pipes froze and our maintenance guy came over and dethawed em with a heat gun. It got to -15 over here. He told us to let the water drip, I listened and they haven't froze since.