Does irregular bleeding after unprotected intercourse indicate pregnancy?

Hello doctor,

I engaged in unprotected intercourse eight to nine days after the onset of my menstrual cycle. Subsequently, approximately four hours later, I took the emergency contraceptive pill. Around 13 to 14 days after this incident, I experienced sudden and intense stomach pain lasting for about half an hour. A few hours later, I began to bleed. I have noticed intermittent mild stomach pain, sometimes with no pain at all. The bleeding lasted for only one day, with clots in my blood, irregular blood flow, and a dark red-brown and black color. I am uncertain whether this bleeding is a result of the emergency pill or if it could be indicative of implantation. I am feeling anxious and unsure about a potential pregnancy. Unfortunately, I cannot perform a pregnancy test at this moment, as there are still 12 days remaining until my expected period, which should occur after seven days. I am seeking information about when I might expect my next period. Kindly help.