On Sunday I started having a light brown & light pink discharge it only happen once that day, Monday I was having thick yellow discharge throughout the day, today it became brown again at one point it became really dark & I had a blood cloth kinda looking come out, it had blood, it was dark brown one part was even black! After that came out, there was no more blood or anything it's just light brown, But what can it be ? I Googled it for more information and all I'm getting is an early sign of either pregnancy or a miscarriage. I'm not really sure about that, I'm on birthcontrol, only time I've had unprotected sex was on November, I took the day after pill, there's 2 pills to that, I only took 1 I forgot to take the 2nd one,& so I didn't get my period that month of November ( I usually get my period on the last week of the month ) on the first week of December I got my period , it wasn't as heavy as it usually is. But either way what can it be ? I'm really scared, should I go to the doctor or wait till it goes away ?