Pink discharge, 15 weeks.

Claudia • 🌷☀️🌴✈️ Expecting baby# 2, due in September! Currently mami to a sweet 5 year old 💕👨‍👩‍👦

I’m 15 weeks 4 days today, and since yesterday I’ve had this discharge in the morning(yesterday morning it was less than this, picture is from today). I texted my OBGYN yesterday and she saw me same day, had ultrasound baby is fine moving all around and cervix is closed. She told me it could have been from movement and impact of an almost car accident my husband and I had Monday(2 days ago today). Today I texted her this picture and told her I had mild back pain but no cramps so she told me to take Tylenol and stay home from work, and if bleeding increased to go see her at the office. So here I am, at home trying not to worry but puzzled at what this could be. Anyone has any ideas or has gone through this?