You were right. Day two and I have a strong headache. If you didn't tell, I would not blame it is caffeine withdrawal symptom. I wouldn't believe it could have such an impact.
In the afternoon I went to pharmacist, but coffein pills are not on stock. Now, drinking strong Darjeeling with pain pill. Going to order pills online. Thanks for sharing.
You may be out of the woods before the pills arrive! Black tea is a pretty good choice for a source of tapering-down caffeine. I only mention the pills because they provide a consistent and known dosage, which isn't always the case with coffee and tea.