Hi Leannie,
I have felt tired all through my pregnancy. I had my 28 week blood tests and they found I was low on Iron. I didn't want to take iron tablets so my doctor told me about a natural iron supplement. It's called 'SpaTone' and it really seems to have done the trick for me. It's £6.39 for 28 sachets and I take 1 - 2 a day. You just add them to fruit juice (have to add it to something with Vit C in it). It looks like water and doesn't taste of anything. I got mine in Boots and I think Holland and Barratt sell it too.
Give it a go, it won't do you any harm xxxx