I have had two subchoroinic bleeds this pregnancy, one was at the site of implantation at just over 5 weeks and I had heavy period like bleeding. I had another at 8 weeks behind the developing placenta but by my 12 week scan they had healed up.

The dr explained it to me like a bruise. You bruise your skin u bleed under your skin. If the lining of your uterus gets bruised it doesnt have skin to sit under so it can come out and give you a hell of a scare.

They are common from what my dr told me and are usually harmless just stressful. They do need to check to make sure it heals up and not gets worse though or it can lead to a hightened risk of m/c.

Try not to stress I've had two and bubs is still sticking, hopefully all will be well I have my fingers crossed for you!!