PTree has posted a really good idea to check if you need HCL or not without expensive doctor's test. Briefly the idea is to take one and see how you react. If you feel some heartburn kind of feeling then you don't need it, but if you feel just fine then next time try to take 2 and so on, until you feel this heartburn feeling, then take away one from the number of pills caused the heartburn and there you have your proper dose.
I loved this trick, tried it, I needed it too. But I wonder: is that possible that sometimes I need more or less, depending on the kind of food I eat? I guess it just makes sense but I would like to hear about your experience...