Hi L.:
If you've been around children most of your young life,then you must know, that they all go through stages.How he was,or what his routine was at 4 months,or even a week ago, is not who he is going to be today.He's nearly 2 years old, and hes experiencing alot of changes.Its around this age,that toddlers develop a wild imagination,and with that come new fears.He has become comfortable with a routine,that you and he have established.When you went away on your business trip,he was thrown off of that routine.He may have eaten at the same time,and gone to bed at the same hour,however,he did notice his MOMMY was MISSING.Toddlers have feelings much like yours and mine,with the exception,they can't express them like we can.He's simply feeling a bit insecure,because he worries you are going to disapear out of the picture again.His spleeping with dad,while you were away,was his security blanket.It was some comfort for him.You didn't mention,if his bed was set up in your room or his own.If its in your room,it may be a good time, to fix his own room up,with things he loves on the walls etc.If hes already in his own room,then, until he feels secure that you aren't leaving any time soon,you may want to go in and soothe him,and let him know you are there.Lay with him for a while,and rub his little back.Give him a night light,as children this age,begin imagining seeing things in the dark,and dreams wake them.My son was doing this,at two, and what we eventually had to do, is pretend we were asleep,spread our arms and legs to the point he couldn't get in our bed,and he gave up and went back to his bed.It sounds mean,but it worked.The hardest thing for us, was not cracking up,listening to him,while he tried to squeeze in somewhere!Just make him feel as secure as you can,for now,and if it continues, after a few weeks and your goin nuts,try the (Bed Hog Approach)I wish you and your darlin Levi the best