If you inserted with condom break and exposed the head, then you need to test. Only the head needs protection though so if that was still protected you wouldn't have a risk.
A duo is conclusive after 4 weeks so after Aug 1 you can test.
I am in same boat as yours .if possible ask the girl about her status be stressfree for a bit..and get tested at 28 days using 4th gen test.do test gor all stds