I had light spotting too at 17 weeks and was then diagnosed with low lying placenta during the 20 week scan, gynae said that was the cause of bleeding. I was prescribed duphaston to relax the uterus, can check with your gynae if you require it!
I have low placenta and 25 weeks now. I had brown bleeding on pad few weeks back n told it was infection near cervic. Doc gave me antibiotics n all well now. Prior to that i went swimming. Could have gotten the infection from there.
I had same experience, bleed like 1st day of period. rush to gynae but unavailable to find any blood. 🤷♀️ baby is 13month old now n healthy 😊