Hello Doc, I'm 18 Years Old. Last Year, On 29th

hello doc, I'm 18 years old. Last year, on 29th Nov, I had unprotected sex and took an emergency contraceptive within 24 hours. On 4th of Dec, I had bleeding lighter than my normal periods and lasted for 5 days. I'm already a pcod patient. I haven't got my menses till this date. I was feeling weaker and had fatigue, so I took two pregnancy test almost a month later and both tests showed a negative result. I'm not feeling any fatigue now bit can feel my breasts being fuller, my abdomen bloated and constipation. Although constipation was already an issue for me since before. But I'm still worried. Could you help me regarding this?