My Brother's Girlfriend Had Her Periods Around 13th Or 14th

My brother's girlfriend had her periods around 13th or 14th july which were her last days (i.e 5th or 6th), and he shared this experience that they had unprotected sex on 18th of july but he pulled it out way before he was going to cum. I told him about the pre-cum thing which may cause pregnancy so he got his girl the after sex pill after around 30 hours and she told me this was her 1st time to take a pill. the problem is that today is 26th and she complained of bleeding... they are both worried whether or not the girl is pregnant. is this the pill side effect or she might be pregnant? Thanks in advance