Brown Spots and Sometimes Red

Okey Girls,
​I been using Glow for a month and I don't if I am prego. I started descharging brown liquid spots in my undies since the 20th of this current month and I was waiting for my period since the 13 so I was a week late for my period. I still have brown spots very little and sometimes red. Anything like this has happened to you guys?? I don't know if i am prego! I need help please.
​Thank you