Low iron even while taking 2 iron pills a day?

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I'm staying dizzy and my doctor says it's due to low iron. It was 9.3 when I first had it tested and so they put me on iron pills.. She checked it again (2 months later) and it was 8.5.. I've been cooking my food in a iron skillet like doctor also suggested and that also hasn't helped.. Any tips on getting your iron up that's helped you? (Having my baby in 14 days)