Death anxiety...

Am I alone on this? It's only at night time when I'm alone laying in bed I have full blown attacks of panic and dread and anxiety about death and what happens and what will happen after etc, I'm 29 weeks pregnant for Christ sake I can't be feeling like this! Please tell me it eases! I had it so bad as a child and past couple nights it's back! I'm only 20 years old too! How do I cope? How do I forget about this? How do I ease this? I want this feeling to stop! I can't get to sleep for ages I worry so much! I feel like when my little boy is here I will be occupied and that feeling Will go, but at the moment I need no stress I need to be calm as I have a high risk pregnancy and high blood pressure! So I need to remain calm and focus on me and my baby and being an awesome mummy! It's ruining me! Advice??