Hai sayang, congratulations on your pregnancy!
Cervical erosion during pregnancy is actually quite common, so you're definitely not alone, quite a few mummies experience this, especially around the second trimester. The good news is, since your doctor confirmed baby and placenta are fine, the bleeding is usually just from the cervix being more sensitive during pregnancy, and it tends to settle down as you progress. Some mummies had light spotting for a few weeks, while others found it stopped sooner; it really varies from person to person. The important thing is to rest when you can, avoid heavy lifting, and of course follow up with your doctor if the bleeding becomes heavier or if you have any concerns.
It's wonderful that you're already being monitored closely, that's the best thing you can do. Do check in with your own specialist about what signs to watch for, just so you have peace of mind moving forward. Wishing you a smooth rest of your pregnancy!