Hi Vikki- just read your post- are you rocking your LO to sleep twice a night now? My LO went through this around 1 yo, after teething. He got used to me coming in and rocking him back to sleep, started waking 2-3 times a night, then I figured out he was not hurting, just expected me to come in.
I did WI/WO for several nights. First 2 nights were bad. I did dose w/ MOtrin just in any remote case of pain. then when he woke I did WI/WO. He hollered at me for an hour, then gave up. It took about 3 nights, then he started STTN.
HTH! Good luck!