I'm glad you're sure its not PND, and hopefully the iron issue is fairly easy to resolve. The symptoms must be similar, because they have tested my iron several times throughout this. I think for me the reason my PND was prolonged was because I didn't have it with DS1 so i was in denial for ages, sure that i wouldn't get it as i hadn't had it the first time. Also i don't know if it helps with iron at all, but since i started taking In-Liven again i have had at least 30% more energy, so maybe thats something you could try if things don't pick up.