Brownish discharge

Hi mamas! This will be our rainbow baby as long as everything keeps progressing. My husband and I had intercourse last Thursday and starting Friday I’ve had rust colored brownish discharge through today. Never enough to soak a pad just like discolored discharge. I still have all symptoms and my doctor is not worried as she said this can happen in first trimester. I’m just wondering if anyone else has experienced this. Our first ultrasound is next Thursday. I am 6wk 4 days. Positive thoughts to us all 🤞🏽❤️