No way to really know for sure. I had spotting that was bright red and everything was ok. She's now a happy and healthy 14 month old. I would call your doctor and let them know. See if maybe they can draw a blood level now and again in 2 days to see if it's doubling like it should. That would at least give you peace of mind. Good luck.
unfortunately it can be either, although bleeding in pregnancy is never considered normal, but it is quite common and there is no real way to know what will happen next unless you go to your doctor and have your hcg levels checked. A good sign is that your not haviong any cramps, it could be comming from your cervix as when your pregnant this gets swollen and little blood vessels are close to the surface and it doesnt take much for one of them to burst, keep an eye on it, if it gets heavier like what your period is like I would go to your doctor/hospital, if everytging settles down, make sure you mention it at your next doctors visit