There are no test's marketed or sold to give a conclusive negative test result earlier than 3 months.
Hiya swed. As the condom broke you have some risk of both. Std's are far more common and a lot easyer to catch. HIV is a concern, but its far harder to catch and from a one time exposure you describe ( 1000 - 1) not to mention it is harder to transfer from a woman to a male. That said you have no idea of her status, and sweden does have a very low rate of Postive people.
So if you test at 6 weeks with a HIV DUO or 8 weeks with a antibody test, your results will be conclusive. Naturally, you need a full STD screan.
I can understand your concerns, but the likley hood of you becoming HIV positive from this is very low. Just a point to mention. Most workers in that industry wear condoms to protect themselves and test regulary, so bear that in mind
Try not to worry, and good luck with the testing