I don't see any evidence that beta thal trait is involved. In sickle beta thal, almost no Hemoglobin A is produced. Your iron levels are on the low side of normal and may require further investigation. A hemoglobin electrophoresis would be able to tell if anything other than sickle trait is involved.
Well, this brings us to the same question we often ask about thal trait. If there are no symptoms, why do so many carriers have such similar problems? Why is a sickle carrier having so many problems? Why is Meme having what sounds like lesser versions of sickle crises? And why when 40% of the red cells are sickled, should we think that won't cause any problems? Why are the books wrong when it comes to trait carriers of both thalassemia and sickle cell?
This becomes very frustrating for the patients because it is almost impossible to find a doctor that will believe your health problems are related to the hemoglobin disorder. When are the doctors going to compare notes and discover that other doctors have patients with the same set of circumstances and symptoms?
Meme, when you see the hematologist take some notes with you and tell the doctor all your symptoms. Don't leave anything out and ask the doctor if these are similar but less severe than what happens in sickle cell disease. You should also have the doctor give you a measurement of your spleen size.