I Have Been Suffering From Extreme Fatigue. I Started Iron

I have been suffering from extreme fatigue. I started iron and a vit supplement a week ago. Tonight, I have shakes and having muscle twitches. I am eating well. 2 bananas today and a glass of milk so doubt calcium or potassium issues. Normal pulse. No reason to have low blood sugar. No changes in bladder habits. No fever. I do not have insurance so seeing a dr. Is out of the question unless dying. Possible suggestions?