Hey, if the spotting was not accompanied by pain or further bleeding then I would put it down to implantation bleeding. It is when the ovum attatches itself to the wall of the uterus; it's completely normal. If you experience any further bleeding/cramps/nausea then I suggest that you go straight to your GP or EPU (Early Pregnancy Unit) so you can be checked out. I'm sure it's perfectly normal however and part and parcel of pregnancy!
G.x (31+6)