Sleep issues

AW has been having a rough time of sleeping lately. I'm thinking maybe he is going through some separation anxiety issues. When he goes to bed, and if he wakes in the night, he needs to know that mommy is there with him in order to sleep. I end up settling him down and then crawling in HL's bed so I can respond each time AW asks for mommy. While it leaves me terribly tired, it is affirming to know that I am needed.