Try not to stress so much, identify and reduce your stressors. Consult a psychiatrist if the problem persists. And try to follow sleep hygiene to sleep well.

Do not overthink,as it may disrupt ur sleep . Consult a psychiatrist

Yes overthinking/rumination can disrupt sleep cycle and cause headache. The major role to play is by the negative/depressive thoughts. Associated is lethargy , generalized body pain and weakness and lack of motivation.

Hello there! The ongoing distress leading to overthinking is being manifested physical as headache. Identification of the stressor(s) is important.

You are 22 years old and just stepping into adulthood. You must have started experiencing harsh realities of life and arec shuffling through various thoughts. It is not a good thing that your sleep is getting affected. If you have a confidant in life, do vent out your thoughts, feelings and emotions. You will get benefit from counselling from a professional