Hi
Welcome to the MedHelp forum!
Your iron level dropping is definitely a cause of concern! There are a few things which come to my mind. May be there is a bleeding in your gastrointestinal tract, say because of an ulcer. Low iron could be due to poor intake, loss from body as happens in acidity and GERD, rectal polyps etc, due to improper absorption or due to storage disorders. You should get your stool examined for occult blood. Also you need to get a pheripheral blood smear done to know the RBC count, structure and whether there is cytopenia (general decrease in cell count). The renal function and liver function needs to be checked as also electrophoresis of hemoglobin to know whether there is thalasemia trait or sickle cell anemia. Please consult a hematologist.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
Have you considered you may have endometriosis? Have they checked you for gastrointestinal bleeding? Have they considered a malabsorption of iron problem?