My little me ultrasound/gender determination?? Advice

Okay so I won’t be available to find out the gender till 21 and a half weeks because something went wrong with my medical insurance. So now i have to wait till after the month of April. My grandma bought me a basic package of my little me if you guys have heard of it. I’m going in at 18 and a half weeks and me and my boyfriend are finding out the gender! Has anyone ever gotten this done?? If so how did it go??