Hi there ~
Bereavement can be a difficult thing. It appears that you have not had any prior experiences with death in your family, close or extended, nor do you have any friends of friends who died. Having problems with sleep and being anxious are common symptoms of bereavement and is not a cause of concern if the bereavement is recent. You will probably get over the symptoms or they will gradually improve over time. However, if you feel like they are affecting your daily functioning in any way, I recommend that you see a psychiatrist
. I hope this helps.