Both of these dreams are pretty typical for someone who has recently had a family member pass on.And they both reflect your fear that she won't be able to communicate with you,to let you know she's ok.
In the first,the closed door prevents her from getting to you.This shows that you feel she may try to come to you,and you'll be "closed" to it,won't recognise it.Don't worry,even if there's a sign,and you don't recognize it right away,you soon will.And she will give you many signs that she's around you,and that she's doing fine.
The second one is pretty much the same,her corpse is "wrapped up"(buried,cremated,whichever way you chose),yet her hand is still reaching.You want to see her reaching out to you,but in some ways,you fear it.More likely,you're afraid you won't see it,or recognize it.
I know I had dreams like this after close family members died,and I know others who had similar dreams as well.I dreamed of my mother as a skeleton,reaching for me.She weighed next to nothing when she died.They can frighten,and they can bring on feelings of powerlessness.Try to tell yourself,after you have them,that the dream was brought on by your own subconscious fear.
When your Mom DOES come to you in a dream,(It may take a little while,but I would bet she will),you'll know.She will be beautiful,as will everything else you see.