Thalassaemia manifests in its minor form as well as its major form. Thalassaemia minor is usually almost dormant which I believe is what you have.
It is best that your husband also go for a blood test to see if he has thalassaemia. If he doesn't your condition will not pose any danger to your unborn child.
My husband has thalassaemia. I dont't. My son is normal.