Concern of whether i’m pregnant or not

Patient: My menstruation arrived Dec 31 and it lasted until Jan 3. I had unprotected sex Jan 6 and took the morning after pill 3 hours later. Jan 12 I started feeling fatigued, had breast pain, mood changes, peeing a lot and brownish bleeding (not like menstruation, but a lot). It stopped like Jan 15. However, today I had a little brownish bleeding again. Am I pregnant? or what’s happening to me?

Symptoms: Brownish bleeding