Faint line. Any chance of pregnancy?

I had my last period from 7th to 10th December and intercourse on 13th December and took unwanted 72 on the same day.  I usually have a cycle of 25-29 days. I took a home pregnancy test on 2nd January afternoon and it was negative. When I looked at the same test strip the next day, it had a faint line. What is that?  Does that mean it's a positive test? I again took the test on 3rd and it came out negative. I started bleeding a little on 4th January. But it was light and brownish. Then the bleeding was very light. Brownish red and sometimes red but the flow was very light. Is there any chance of pregnancy?I took a test today that is on 13 January and I'm not being able to figure out if it is pink in T area or not. Could you please kindly look at it and tell me if the test is positive or if it's pink in that area