First things first - make sure you're taking good care of yourself. If you haven't already, stop drinking, smoking, etc. - anything that might harm the baby. Make sure you're eating right, taking your vitamins, and getting enough rest. At this point, if you think you might be pregnant, better safe than sorry.Have you taken a pregnancy test? If not, I'd take one first thing in the morning when pregnancy hormones (if present) are at their highest levels in your urine. Some spotting/bleeding is not unheard of in early pregnancy, and if your family has a history of it, you might be pregnant.If the home pregnancy test comes back negative, I'd make an appointment with your OB/GYN. They can give you another urine test in their office and follow-up with blood work if necessary. They'll take blood samples every few days for about a week and chart the levels of hCG in your blood. If you're pregnant, the amount of this hormone will increase at each blood draw until it reaches a plateau. If the levels don't change/never increase beyond a certain point, then the doctor can rule out a pregnancy.I hope this helps. Good luck!