⚠️HELP ME PLEASE ⚠️

i am 17 , im sexually active with my boyfriend and we have unprotective sex , this never happened to me and i don’t know what it is , i got my period weeks ago and then around now i have been having , pink , brown, sometimes dark red discharge . it comes and goes every single day and i don’t know what to do , i don’t have money to get visited by a gynecologist, my mom can’t know she’ll kill me if this is something serious , this discharge won’t go away it’s been like this for a few weeks now , if this has happened to any of you please help me , i am crying out in silence for a another woman that is sure about what this can possibly be ?????