A duo test is conclusive at 4 weeks and any other test after 12, so to calculate her window period you need to know which test she used. If not a duo then the only concern would be any unprotected that she did from around May 8 onward.
Try to relax until you can test, and focus on the fact that you don't get HIV every time you have unprotected. Or if you can get her to do a duo on the 22nd or after then you won't have to test.