What is the best fluoxetine dosage for mental helth problems?

Thanks a lot for your pertinent comment.
I'm taking 20mg fluoxetine combined with 50mg amitriptyline. And I want to increase both drugs for better and fast removal of my problems of headech pain and migraine.
I propose 40mg fluoxetine morning and 75mg amitriptyline. But I'm not sure the side effects .
Please give me your advise

Some more reading for you.
"https://www.drugs.com/interactions-check.php?drug_list=168-0,1115-0";
https://www.drugs.com/cg/serotonin-syndrome.html
The combination presents a slight risk of a potentially serious but rare interaction. Doctors are aware of this risk but for most people the benefits far outweigh the risk.
How long have you been taking the two medications? Although improvements may appear early in treatment it can take 4-8 weeks for the drugs to reach maximum therapeutic levels.
Talk with your doctor. Maybe giving it a bit more time and see how you're doing. See what the doc thinks about increasing your dose. The dosages you plan are well within the recommendations.
WC