Hopefully you ovulated late and just arent as far along as you thought you were. 5 weeks is too early to see a heartbeat so dont worry about that. Your next ultrasound should give you more information.
5 weeks is usually too early to see heartbeat. By 6 or 7 weeks you should be able to. Don't fret it's still early.
Good Luck hope it all goes well for you will say a prayer
its too early to hear the baby heart beat at 5 weeks of pregnancy so it normal, dont worry next time you can hear the heart beat of the baby . Good luck keep me posting.