Really? 120 is good for non-pregnant women. You obviously weren't anaemic prior or at the start of your pregnancy which according to the research on iron levels and pregnancy, you aren't anaemic now and not at risk. It just seems like another case of medical care pathologising the normal in pregnancy.

What is in the iron supplement you are taking? Hopefully it is not ferrous sulphate. Since it is not supported by evidence and your body that you currently need iron supplements, you might want to look into just relying on diet and your prenatals for iron. If it is ferrous sulphate, and you don't want to stop taking it, talk to your doctor about a supplement that is ferrous fumarate and ferrous gluconate - or just get a substitute for your supplements like floradix or spatone.