Raising a Special Needs Child

I am 30 and my wife is 29. We got married 6 years back and for first 4 years we didn’t have any child. Praying to God for a baby and medical treatment got us a baby 2 years back. We started to believe in God and became religious minded. God gave us a special needs child who is also sick a lot. We are doing our best for his treatment, my wife even shifted to Mumbai to get better treatment. Baby is improving. Sometimes I think that God is harsh on us to give us a special needs child, sometimes I think that God is kind on us so that we can at least afford to give best treatment available to the child in India. It has left me all confused why this happened, is God good and kind on us or is He just testing us, making us stronger for something worse to come. I get this mixed emotions about God all the time, please help me.