Anyone else on iron?

M
I just got my bloodwork done and found out that I'm anemic and I need to take iron. My doctors suggested I take it for delivery because you lose a lot of blood. Anyway, after I took my pill, my stomach was exetrmely sore to the touch and I've been really uncomfortable since taking it yesterday.  I'm still uncomfortable but I don't think I'm gonna take these pills if they are going to give me this soreness. Anyone else?
 If you are taking any iron please tell
Me how you feel after you take the pills or any symptoms you experience.