Bleeding and low lying placenta 15 weeks

I’m 15.5 weeks pregnant and had a scary episode of mild bleeding the other day. After a scan, my ob diagnosed that it was likely due to my low lying placenta. Thankfully everything looks good with baby and she couldn’t see any blood on the scan. Has anyone else experienced this and had a good outcome? Doctor says it should resolve itself but I’m having a ton of anxiety. This is my second baby and I never had any bleeding with my first.