Beta thalassemia minor😩

I am a carrier of beta thalassemia minor. Basically there isn’t enough oxygen in my body. My experience with it has been the worst. I was diagnosed at the age of 15 after fainting in school. My symptoms are headaches, ringing sounds in my ears, blackouts ( vision temporarily blacks out but my eyes are open... then I faint), dizzy, nauseous. There’s not much I can do about it. All the research I’ve done says thalassemia minor should not have any symptoms. Doctors keep telling me my hemoglobin is low but not to the point where I would need blood transfusions as yet. I faint and end up in the hospital just for them to tell me the same thing over and over. I’m so annoyed with having this. I’ve changed my diet and started exercise again... thought it helped but these symptoms come back 😩I give up. Just gotta deal with it. Anyone else with thalassemia having these problems?