Asking for a friend- Do you think she’s pregonate?

Hey y’all, so my younger sister who is 17 just recently lost her virginity to her boyfriend. She did the deed 6 days ago and is currently about 2ish weeks from her period. They did not use a condom, but he was only in for like 3-4 pumps and then stopped. Never came close to climax. He peed before hand and had not ejaculated prior to their encounter. She has been spotting the last day or so. My husband and I have tried to explain to her that she more than likely is NOT pregnant but she will not listen to us. She is incredibly active and is going to college fall of 2020 so she’s freaking herself out. Crying and having panic attacks. Can y’all please help ease her mind? (I know she shouldn’t have had sex not having the proper knowledge of sex ed, but shit happens and there’s nothing that can be done now. I have already talked to her about that and have been working to educate her so please no negative comments in that regard) Thank you!