Hello!
Complex PTSD is a condition that can only be treated through trauma therapy. However, you may be able to manage your PTSD by reading books on the topic and gaining empathy from this wonderful community.
I can share some tips that work for me:

1. Sleeping, eating and exercising properly will cut down 30% of your symptoms.
2. Self talk- tell yourself 'I love you' 'I can succeed' 'life will get better' etc.
3. Practice mindfulness of your body sensations, somatic experiences and thoughts and feelings.
4. Belief in a higher being.

I hope this helps. Good luck!