Hello there
Your symptoms are suggesting towards the possibility of depressive disorder which is also very common after delivery. Headache and disturbed sleep could be some of the symptoms of depression. It is completely treatable.
Next Steps
consult Clinical Psychologist or Psychiatrist for final diagnosis.
Health Tips
share your thoughts and feelings with someone concerned. Try to break day activities in small tasks including your child's responsibility that may be more satisfying. All the best.