Hey, I would try and call your primary care physician or your OB if you have one. If not, I would recommend calling a pregnancy help line or something-- they usually have healthcare practitioners that can answer questions like that. If it's light spotting, I would just make a doctor's appointment and keep track of it-- see if it worsens or stops (lay down, elevate your feet, etc.). But if it's heavier, I'd skip all that and go to the ER.
FYI: American Pregnancy Helpline 1(866)942-6466
Just googled that real quick, but you could call them if, like I said, you don't have an OB or physician that you can reach.
DD: 10 Nov 11
Christian, vaccinating, fun-loving, breastfeeding, cloth diapering, positive disciplining, nerdy, extended rear-facing, bookworm, creative, homeschooling, outdoorsy, autodidactic, friendly family.