Sayang, I know this is scary, especially first baby, but please see your doctor or go to the clinic/hospital today to check, okay? Brown spotting with clots needs proper assessment, even if there's no pain. The good news is your baby's heartbeat is already there, which is positive, but only your doctor can tell you what's happening with the spotting and whether baby is implanting properly. Don't wait, even if it seems mild, better to get checked and have peace of mind. Rooting for you!