What Causes Brown Vaginal Discharge After Unprotected Intercourse?

Hello. I m worried about the risk of pregancy, or any other problems from this. I had unprotected sex for the first time on February 15th, but he put a condom on later and used the pull out method too. I got my period on time February 26th and had the same flow as every period. My actual bleeding lasted up until March 4th. My period usually lasts 6-7 days. However, I am still getting a brownish red discharge from March 4th to today, March 6th. This is 2 days longer than my usual period lasts. It is not a heavy flow at all and I do not have any cramps, bloating, headaches, constipation, etc. Just a brownish discharge. Is this normal or should I be worried?