Low lying gestational sec at 4weeks+

Hello, I had my 1st gynae visit yesterday. Found out my gestational sec implanted lower at 1/3 of the womb. Is there a concern? I'm starting to worry after googling similar situations. Gynae say it depends on where the placenta is. Hopefully higher otherwise there will be risk of bleeding or C-sect needed. At this point, she didn't mention on a threatened miscarriage but I can't help but worry. I'm scheduled for a return visit 2weeks later. As of now, no heartbeat developed yet or embryo seen. Any advise?