M.T.
I agree with Muriel. Sleep begets sleep so hang in there, be consistent and this will soon pass. At 20 months (as in previous months), his growth spurts, cognitive and motor development keep him thinking/doing all the time. I would do just as Muriel suggests and not allow any bad habits to develop. Little ones have phases of light and deep sleep too and it sounds like his sleep is a little disrupted right now. One thing I would add is to consider how bright his room might be in the morning. Since my son's room faces the sunset, his room was too bright at night. A mom here suggested blackout curtains. I have vertical blinds that are set in, so the sunshine would come in around the sides. I know I wouldn't have been able to sleep had it been my time to go to bed. Likewise, sleeping in the morning is hard if it is too bright so consider some darker window covering that goes beyond the sides and edges with a valance at the top to keep the room nice and dark in the mornings. I didn't spend much money on our situation. I bought enough fabric to make a double panel curtain (the side facing out is tan and the inside is dark green). I also added a border at the bottom to be make the curtain a little longer than the window. I bought a curtain rod and rings and simply clipped the panels to the curtain. It has been a life saver for us and my son sleeps great. All the best to you and your little guy, M.