Let’s talk oops pregnancy right after giving birth!

Has anyone gotten pregnant within 10 weeks after having your first baby? I was always told that your first 3 month or 12 weeks of postpartum is nearly impossible to get pregnant again, but..... I’m guessing that’s not exactly true 😣 I am a little panicked right now and not sure what to do or think about this. I was told that hcg only last in our bodies until you are 4 weeks postpartum and I’m 10 weeks.... So does anyone know what could be going on here? Help please 🙏🏽