What do you guys think? Answers please!

Tasha • Mother of 3💜💙💙

So I’m currently 5 weeks and 4 days. Had an ultrasound today measuring on point but since I’m early we only seen the sac. This Saturday I had scheduled another ultrasound to see the baby’s heart beat on my boyfriends birthday. Does anyone know if I can go from just a sac to a baby’s heart beat in just 5 days ??