A couple months ago, I had unprotected sex with a man I did not know well. I know it was stupid of me. I do not need the lecture about protection and condoms I give it to myself enough. I went at 8 weeks and got a full std screening including hiv and syphilis. All test came back negative. Can I consider these conclusive? My nurse practitioner that I had the appointment with stated that I do not need to come back in for any more test since they were all negative. Can I take her advise and stop worrying?