UTI, Vaginal Bleeding, Contraceptive Pil

Good evening I am a 23 years old female. *I had unprotected sex on 8th October and took contraceptive pill on 9th October (approx 30 hours after). I started bleeding the next day. I an constantly having urge to pee but only a few drops come out. I also see blood, or blood particles in the blood. Also noticed some dark brownish blood. *My menstrual circle is normally after every 28 days. I last had my period on 26th September to 30th September. *My questions are the following: 1. Is this a side effect of the Pill or could I be having UTI. 2. Am I late in getting the treatment as it's been 3 days already? I am attaching a test report i went through today (12th October). I am really worried and depressed about the situation. Could I be having any infection in the body? Thankyou for your patience and time. I am looking forward for your valuable feedback. Any help would be appreciated.