Spotting 13 weeks pregnant

Michelle • Mommy to a lil angel in heaven 🙏🏼👼🏻 and mommy to my sweet rainbow baby ❤👶🏻 Baby#2 on the way🤰

Is anyone else spotting? It started yesterday at 5 in the morning. There was a trickle if blood in the toilet and I wiped it was red and then brown. Went to my doctor and she said everything looked good. (She did a pelvic exam and culters) No opening and babys heartbeat was 150. Now this morning again, same thing but a little less in the toilet. I'm scared. I dont want to loose my baby. I've had my share of a miscarriage and I just cant go through that again.