Frequent daily headache. Help me out!

I have been suffering from a headache for the past 4 months, I have done physiotherapy regularly and it has not worked out. I had been in treatment for anxiety and ocd problems for the last 8 years and took medication for it . From starting 2025 my psychiatrist doctor advised me to discontinue the medication while I was tapering the medication properly before that. After 5 months of stopping the medication I started getting a headache frequently. But I have had the headache for 5 years on and off while taking physiotherapy and it settled down. But now after taking amitriptyline 25 mg by doctor advised the headache not settled down properly still getting daily. But know why this is happening . Please help me out