Also The iron in dark green leafy veg is disipated and used by the body faster as it's easier to digest. If you do eat a lot of green leafy veg try having some say with lunch and dinner. I was vego whilst pregnant with DD and I found just having a handful of baby spinach leaves on my sandwich for lunch seemed to top me up and stop a mega low in energy. Nuts and seeds are good to nibble on for snack for protein and such. If you eat yoghurt you can get something called I think SLS (having prego brain in this heat) in the health food section. You can sprinkle it on yoghurt for brekky, put it in a smoothie etc and it's a great source of protein which is important for cell renewel and repair. If you're sick and protein levels are inadequate then it might take longer to get the cold out of your system.

HTH and I hope you feel better soon