body talk

I'm 16 and a virgin I've only ever masterbated and last night I found brown discharge when I was getting out of the shower Google said it usually happens after your period but mine ended 3 weeks ago I'm really freaking out I don't know if it's because of my period or something is wrong I have also been sick for the past week and a half but I'm really scared and I don't know how to talk to my mom because she doesn't know I masterbate does anyone know anything about what I'm going through or any advice?