Low in iron level

I am low in iron and i really don't understand how low is low, my doctors office said 4 out of 7 but my hemoglobin is normal, however I feel tired all the time very tired I can't get anything done, and he got me on double dose of iron pills a day for the next 6 weeks he said and then if that doesn't work I will have to go in for the needles, they have not found the sorce of what is causing this and they have looked, the next place they are looking is in my small intestine next week, I no longer have a period so that is not the problem but I feel like this has all started since I have been on Crestor about 1 1/2 year ago do you think it is prssible? I am also on Synthroid and Topiramate but ever since on Crestor I have gainded 20 pds and my iron has gone down is this the reason? Looking foward to you anwer, Jackie

[SassyLassie]

I just answered your other post, I hope it will help some.