just to expand a little bit on what thegino said:
if it was a het x het pairing 25% would be albinos 50 % would be Hets and the other 25% would be normals. So we can logically conclude that two thirds of the normal looking snakes would be Hets. the only way to know for sure would be to breed to another het when the time is right.
if it was an albon x het breeding, your snake is definately a het.
you should contact the person you got it from and ask