If you're defining a plateau as a week of staying the same weight, since starting 7 1/2 months ago I have had 7 occasions when that happened. It hasn't stopped me making progress in the longer term. Since a few were TOTM-related, I often had a good loss the next time the scale moved, but sometimes it was just a pound. It's what happens in the long term that matters the most, so don't beat yourself up over it and don't let it throw you off track. Take note of what happened if you think there is a specific cause, make changes if you need to, but otherwise don't worry.