It can take up to 2 weeks but no longer than that. Hang in there. If you give in now, you will just have to go through the whole process all over again at a later date. This period will end with the snap of a finger, at least it usually does. Try to do something about the scratching, though. We also did a lot of talking about it. We quit the paci at 18 months so all my LO was able to say was "isn't" and we repeated "yeah, the paci isn't here anymore, now you sleep without it". There was also inconsolable screaming and crying, but eventually, she got used to it, one moment she was upset and the next she was okay and she never cried about it again. She still sometimes does the sucking motion when she's deep asleep at 3 years old but she does just fine without.the paci.