Nervous/excited for first US

Hey, ladies! So according to my LMP I am 7w so I made my appointment for my first US for this Wednesday.... My cycles are longer than normal so I really feel like I am truly about 5w. Is my upcoming US still going to be able to show my baby and heartbeat? I know most places won't even take you until 7-8w so I'm nervous nothing will be accomplished this early on if I am truly only at 5. 
Any comments/advice is appreciated! 😘