To go or not to go.... PLEASE READ

Tiffany • Mommy to two boys (4&2)💙💙.Pregnant with with my baby girl 💗 DD:7/3/17. Two angel babies 😇. Married 💕
So where I live we have an ultrasound school that does free ultrasounds after 18 weeks. So I set an appt next Friday because I'll be 18 weeks by than and I'm jut anxious to see our baby and also know for sure if the blood work is correct on us having a girl. The school asked if I had already had my 2nd trimester anatomy ultrasound. I fibbed and said yes because they won't do it if you haven't. I will have my anatomy ultrasound the week after visiting the school. I know they do it out of concern incase they find something on ultrasound that is wrong. Would y'all still go to appt a ultrasound school to see baby an extra time or wait an extra week when you go to the dr?