So I had a doctor's appointment today , my doctor tried to listen to the heart beat and couldn't…

So I had a doctor's appointment today , my doctor tried to listen to the heart beat and couldn't hear it , so she got one of the roll around sonogram machine and as she listened to the heart beat she sees what she thinks is a little boys pee pee . I'm pretty sure I saw it too , but not a 100% . What is it supposed to look like if it is a boy ? I got back July 14th for my 3D sonogram to find out FOR SURE , I just really wanna know now ! It's driving me insane !