Is Trivenz The Right Medication To Prevent HIV Infection After Unprotected Sex With Someone Who Tested Positive?

I met a lady and she sent to me her HIV kit result which was negative and I also did mine and sent it to her. We had unprotected sex and after that I insisted we redo the test. Unfortunately her result came out positive and mine negative. I am went to the pharmacy where I got trivenz to prevent me from possible infection. Is this the right medication?