Ay, alam ko yan mama, nakaka-worry talaga lalo na first time! A few of us moms had polyps during pregnancy din and some did have that brownish spotting, kaya okay lang at common yan, the important thing is baby's heartbeat is normal and your results came back negative, so that's really good news! Since nag-ER ka na and they checked baby thoroughly, I'd still ask your OB to monitor it lang in your next visit para peace of mind mo, kasi bawat pregnancy naman is different and they'll know best what to do based on your specific case. Praying for a smooth pregnancy for you, mama!