Please do not restrain him to force feed him iron supplement. We had to do this with our child and it broke the trust level we had established with solids. She stopped trying any new foods and even now still is extremely resistant to trying new foods. Up until I gave her the nasty iron supplement the ped bullied us into, she was fine with trying new foods. Know that if your LO is already resistant to new foods, adding something that is entirely unpalatable (and likely upsets his stomach too) will NOT help with the smooth transition to solids later on.
The key is get something that is palatable for him. If Floradix is, then great. We found Tri-Iron, by Trilight Herbs
, and it was WONDERFUL (thanks to a mama here on MDC, who recommended it to us). It's herb-based iron and given in drops -- literally. Like we gave 16 drops a day (8 drops 2x a day as I recall). It has a sweet taste and is very easy to mix in with orange juice or other liquid if need be.
You adding more iron to your diet will NOT bring his levels up. That would help maintain his healthy levels, but if he's anemic and his levels are already below where they need to be, you have to supplement somehow to restore iron stores, then you can rely on the minimal amounts that come through BM to help maintain if he's still not on solids.
But it pains me to read about so many mamas who had to force-feed their child iron. It was a truly awful experience for us and has had huge ramifications in terms of her willingness to try new foods, and that has proven extremely frustrating in terms of maintaining a healthy diet for her.
I just want to hopefully prevent others from going through the same issues.
Once he's on solids more readily, you can cook with cast iron, you can add iron-fortified foods (like oatmeal) to things like pancakes, muffins, etc. Always make sure that iron is taken with vitamin C (helps absorption, as PP pointed out) and NOT calcium -- calcium inhibits iron absorption.
ETA: This pregnancy I've been incredibly proactive and am taking iron daily to ensure *I* do not get anemic in pregnancy. I am convinced that the reason Guinevere got anemic was because I was anemic in pregnancy and it took a while to get it under control. Her iron stores ran out prematurely and I didn't know to continue taking iron while EBFing.