I Have Been Getting Treatment For Iron Defficent Animia. I

I have been getting treatment for iron defficent animia. I saw a Hematologist a little while ago and he upped my dose of ferrous sulfate 325 mg to twice a day. My regular doctor missed changing it on my record, so I have been missing doeses for a few days now. Is there any chance that my body could go through a withdrawal without the prescription? I have been dealing with stomach issues for a little while now. Please, can you help.