Was it bad cause your doc only seen a sac at 5 weeks?

Seeing only a sac at 5 weeks of pregnancy can be concerning, but it's not uncommon. At this early stage, it may be too soon to detect a developing embryo, as some pregnancies progress at different rates. It's important to follow up with your doctor for further monitoring and possibly another ultrasound to assess the situation. They can provide clarity on what to expect moving forward.