To reduce stress and resulting head ache, almost instantly:
take Ferrum Phos 6x, 4 tablets in 15ml warm water and drink all the water. 1 hours after Ferrum Phos 6x, take Kali Phos 6x, 4 tablets in mouth directly 
Rescue remedy is another temporary support and help
For long term fix, take Sarasaparilla 30c, 2 drops in 10ml water, every night for 2 to 4 weeks. You will see the mind calming slowly. The results are permanent. Phytolacca 6 can be taking in the night after this for another 2 to 4 weeks for additional support.