Iron supplement?

I will be contacting my OB but this is my second pregnancy (they are back to back got pregnant with my second when my daughter was 7 months-planned) I started taking prenatals again before we started trying just like with my first. I know a symptom of first trimester pregnancy can be dizzy when you stand up. I’ve been getting this a lot. Nothing horrible it goes away if I give myself a minute but I read it could mean an iron deficiency? My main craving this pregnancy has been meat. Has this happened with anyone? Did you take an iron supplement and it went away? Thanks!