Kristina,  I don't want to make you feel bad but what you are experiencing is so normal for traumatic loss.  The part of feeling paralyzed, difficult to go shopping, or just out of the house.  Feeling it physically.  I know I have felt the same way and I am still working on how I am going to continue stay afloat constantly feeling the loss.  I could write a book about how i have tried to endure and all I can say is "one minute at a time".  Only do what is right in front of you.  Every day, one minute at a time.  And be ok with whatever that is, because when loss hits that's all we can do.  Take care.