Pink Discharge Meaning??

So my period ended 3 days ago, I last had unprotected sex 5-6 days ago. I missed my last 3 active birth control pills. My "period" was a week early compared to when my placebo pills were supposed to start. I just went to the bathroom and my discharge was pink and paste like. I don't think I could be pregnant simply bc I'm small/thin and eat once or twice a day. So I don't think my body could handle a baby. Any ideas?