Hay, mommy! Brown spotting in early pregnancy can be scary talaga, but since your doctor already checked everything, heartbeat is strong, ultrasound looks good, urinalysis is okay, that's very reassuring. A lot of us moms have had light spotting early on and baby turned out perfectly fine, pero since it's still happening, best to follow up with your OB again sa next visit or sooner if the spotting gets heavier or you feel anything unusual, okay?