can beta-thallasemia-minor have symptoms?

I was diagnosed with beta thallasemia minor at about the age of 5.  I never realized I had any symptoms, but as I am now 45, I'm beginning to wonder.  I had an incident that put me in the hospital for another cause, but it effected my enemia so much so, I was given a transfusion.  I almost immediatly recouperated from both causes.  I sometimes experience "frozen" fingers where the circulation stops to one or two of them stops and they go ice cold.  It usually lasts only a ferw minutes.  I have restless leg syndrome.  I have difficulty sleeping.  My sleep habits are off.  I feel extremely tired and lethargic, especially in the middle of the day.  I also have a massive craving for salt.  I been told that my bone marrow compensates for my enemia and in doing so gobbles up electrolites.  Is that true.  I have also recently found myself becoming potassium deficient.  Is that also related.