Gender scan today

Hello ladies. I'm 20 weeks 3 days and I go in today for my gender scan. I dont know why but I am so nervous and full of anxiety. I have 2 boys and would really love a girl but I also would love another boy. I hope that the baby is healthy and perfect. I'm not sure how I'm gonna react when I find out the gender. I cried with my last pregnancy because I wanted a girl so bad and he turned out to be a boy. But now I feel so selfish for crying. I'm so happy he turned out to be who he is. Am I going crazy or does everyone get like this with their gender scan. I just feel so anxious. Thanks lovies