Sending you hugs for today, you will get through this, they won't make you do anything you don't want to so try not to over worry yourself before hand. It is heartbreaking, lean on your hubby, ask all the questions you are worried about, the staff are there to support you.
I practice Mindfulness for relaxation so when I felt myself getting really stressed I repeated in my head "Keep me safe and free from suffering, keep me as happy and healthy as I can be, grant me ease of mind and being". Exhale your breath and shake out your hands to try and release the anxiety.
What you are feeling is normal, it is grief, when your thoughts overwhelm you acknowledge them but then try to focus your thoughts on getting you through this. Take care for today xx