Hey low haemoglobin level is the same as iron low blood, (for the record I am not a doctor and don't even play one on TV). I can remember the TV commercials for Geritol for those with Iron poor blood.

As said before it is probably just a swing in your diet/vitamin levels. Make an appointment with your doctor to ease your mind and just in case. Pick up some vitamins - with iron - and take these for a while.

I have given over 3 gallons of blood, before there were more medications than blood in my veins. Each time they would check the iron level. I asked once about this and they said that it was normal for the iron level to cycle. The normal reason for a drop was diet/vitamin issues and nothing else.

As suggested go eat a stake and have some Guinness. They both should help. If not have another Guinness.