Hun I have no real advice because we are dealing with our own challenging behaviour but do you think something like Magic 123 would work? Lots of people recommended it to me when I posted about DD a few weeks ago. I am looking into Positive Parenting courses as well because I have days of feeling worn out and I hate yelling and the parent I am on lots of days recently. I have to fly but coudlnt read without giving you a HUGE and telling you that you are not alone and I think the 3's are worse than the 2's.