Low Iron!

A

I am 25 weeks pregnant and I received a call from doctor telling me that I passed the sugar test (not sure what it called) but my iron is low and if it did not increase I need to take iron infusion I believe it is called (not sure).

To be honest I'm kind of scared. I hear some people saying that it hurts, it can cause stomach pain, headache, dizziness and so on.

I want to know if you had it and what was your experience.