hello doctor.i had a brief unprotected vaginal sex with a prostitute in England uk,it lasted about 30 second to 1 minute max.i phoned the prostitute numerous times and she was offended and annoyed that i asked her and she guaranteed she had no hiv or other stis.anyway more importantly onto my tests.i have had 4 x 4th generation duo ab/ag tests at 3.5 weeks, 4.5 weeks,6.5 weeks and finally at 12 weeks at the local GUM clinic,all came back negative, also i was tested for ghonerea , chlamidya and syphilis at the same times,all negative.so my questions are,AM I TOTALLY,CONCLUSIVELY NEGATIVE OF HIV, AND WOULD MY TESTING OVERULE ANY SYMPTOMS BOTH PAST AND IN THE FUTURE FUTURE ?????as an anxiety sufferer it would be great to get some advice,the clinic have stated that i need no further testing.thankyou in advance