If you're concerned about
constipation from iron supplements, I suggest Colaze (pronounced Coal-aize, not sure how to spell it), it's a stool softener that you swallow in pill form. Doesn't cause diarrhea, it just loosens everything up. I had to take it when I was pregnant constantly from constipation and I didn't even take prenatal vitamins! (couldn't, I would barf them up)
So if you're nervous, get a second opinion on how to bring your iron levels up safely as well. I'm not sure this doc knows what she's talking about. "It's not a life or death kinda thing" does not ease our anxious minds! It makes us go down the "what if" train... which you're on. What iffing if you have to have a blood transfusion, etc. Everything will be just fine however!
Let us know how you are doing!
TG~