How to find out gender early? HELP.

Debbie
Hey everyone. I'm a first time mom. I'm about to be 13 weeks and notice so many mommies posting about gender already! 
I live in southern California and go to Kaiser Hospital and asked if they would do the blood test but since I'm not high risk they will not give it to me. 
I just want to know if there are actual trustworthy clinics I can go to find out the gender. My family is dying to know and so am I.