HCG levels 9w5d

I took a blood test just to confirm I'm pregnant I haven't had my first appointment yet. So the test says I'm 75228 and I'm so confused cause idk how far I really am. This app says I'm 9w5d but I'v been doing some research and I could be 6,7,8 weeks? I don't understand! I need help my last period was February 10 and the next one never came wich Should have happened March 13 but I was under so much pressure and stress... I'm so confused HELP!