Salam sayang, I understand you're worried, especially with your history. At 5 weeks, sometimes the gestational sac shows first before the heartbeat, so it's not always clear yet. But please follow up with your doctor soon (within a few days) for a repeat scan and blood tests to track your hCG levels, they'll know what's normal for your dates. Given your ectopic history, your doctor needs to monitor this closely, okay? Don't stress yourself alone, call the clinic and ask for an urgent follow-up. They'll take extra care with you.