I think you know intellectually (if not emotionally) that the chance of HIV in this situation is almost zero. The chance a partner like yours has HIV is zero for all practical purposes.
Your 2 week test actually is modestly reassuring as well. Although too early to be conclusive, about half of all infected people would have positive results by then (depending in part on what exact test you had).
You don't need to wait 3 months for a conclusive result. Talk to your doctor or clinic about having a DUO ("4th generation") blood test, which is conclusive at 4 weeks.
Or speak with your partner, tell him your fears, and ask him to be tested. If he has a negative HIV test (any kind of test will do), then you'll know for sure you were not exposed and couldn't have caught HIV.
In the meantime, try not to worry. There's really no chance you were infected with HIV.
Final comment: I hope you were tested for gonorrhea, chlamydia, and syphilis. Trichomonas is an STD, and marks high risk for these other STDs. Also, if you haven't told your Swiss partner about this diagnosis, if you haven't done so already. He needs to be informed and treated for it.