Sorry. It is very concerning. Though I know usually it is normal and all the girls on my 'pregnant after a loss' board had spotting early on in pregnancy and now have healthy babies, it still makes me worry. Especially because it can mean low progesterone or something bad.
My advice is to call your doctor and get checked out. I'm going to request an early scan. This is now my 4th day with light spotting as well at 6 wks. Though not bright red (I'm told if it is brown, it is old blood). I haven't rushed to the doctor but think I should call tomorrow if continues.
Wishing you the best of luck.