Cozmo,
Don't worry. You are not alone. Hopefully, you won't have any problems with aza. I used to be on 100 mgs of aza and had no problems. Regarding supplements, you might want to consider either a time release or chelated iron pill or you can try to get more iron from food, such as fortified cereal. As for Vitamin C, I get the recommended amount from a multivitamin pill and only take 1000 mgs when I feel like I am about to get a cold. You might want to give the aza a week if you are feeling okay, slowly wean yourself off of that high dosage of Vitamin C.