he wants mom and is overwhelmed with sharing- if he has never shared before he is jus learning especially since you said it is just the two of you- I know it's hard as a single mom-the crying is his way of saying he's tried things are different and he misses you terribly but he can't verbalize it neither can he verbalize to the little ones how frustrated he is so he bites----- I imagine the daycare has no clue what to do- I even had a child bite with me standing close to him and once when I was changing his diaper- a child walked to close and he took a bite out of his ankle- a child that has been alone has no clue how to begin to share until they are trained-
try saying 'only kisses- no bite" Our little boy that was a bite-er loved to give kisses and hugs too- but he still kept biting like I said- even with me right with him- he was FAST----one time he did it so fast- and there were 3 parents standing by him and we didn't get to him in time- it is so unexpected and it just looks like they are playing together then all of a sudden- ackkk-
If you have the money- he made need home daycare like a nanny maybe with only one bigger child to learn to share with but you know- he might even bite the other child- I don't know how to fix biters- just know it takes time --
hugs mom- I know it's hard
He is unhappy at this day care, I doubt that he has developmental problems this is their cop' out , they dont stimulate them enough or he is bored, as he is okay at home that should tell you the problem is with the school , he is very young could you cut your hours and be with him more, they are small for a very short time, if you have to work find a Day care that dont pass the Buck and stimulate and play with the children maybe he has been sleeping too much there.as very often the children sleep many hours then act out at home.