I understand your worry Prayin and I'm sure I would be too despite my best intentions... But remember that spotting/break through bleeds in early pregnancy is really not that unusual. The fact that it's pink is good too - I'm sure your little bean is just snuggling in a bit deeper. My friend had a relatively heavy bleed at 6 weeks - she went to A&E for an emergency scan and they discovered the baby had changed his mind about where to implant and moved to the opposite side of the uterus leaving a nice bruise at the original site! Little trouble maker!
So don't worry, I'm sure all is absolutely fine. At least you've your scan tomorrow morning to put your mind at ease.
Army - when was your last period? Maybe babycenter isn't counting the 2 weeks prior to ovulation?
Almost - have been wearing panty liners because of the progesterone pessaries and I think they may have been causing a bit of irritation. Left it off for the afternoon and I've no thrush-like feelings now so fx'd!