I'm very impressed with your English skills.
Unfortunately you're not alone in your suffering. I have found the same thing, comfort in knowing I'm not alone. Never apologize for venting, that's what we're for. Sharing what you're going through can help make the process easier.
I admire all of the things you have tried as well. Unfortunately, it's trial and error, educating yourself and working with your doctor and neurologist. Have you tried identifying the foods, environmental and other triggers that cause your headaches? If you can identify things that trigger your headaches sometimes you can reduce them.
You mentioned that physical exertion made them worse, I have the same challenge. I have found that a little bit of exercise every day - just short walks to start - helps me overcome the effects of physical exertion on my headaches.
Are you seeing a family doctor and a neurologist? Sometimes a psychologist can help you deal with the pain as well.
Stick with it, you will figure it out and keep checking in. We're here to listen.