Thalasemia Beta Minor

I have thalassemia beta minor, since birth. I got the diagnose when I was young, about 5 years of age because of acute anemia.

I have had anemia two times since, been really sick, and had gallstones.
The doctors here seem to say different things, and usually are of the believe that there shouldn't be any symptoms with beta minor. However all in my family with the disease, has had symptoms.
I would love to learn more about the disease, and see if there are other with beta minor, who have had symptoms as well.

Thank you.