Dear doctor, my last sexual contact was 8 weeks ago through oral. I got tested 7 weeks ago for hep a,b, and c, hiv early detection rna test, syphilis, herpes 1 and 2, chlamydia and gonorrhea. The test results all came back negative. I was wondering how accurate these test results were due to the time I got tested. I have blood and urine. I am not showing and symptoms but a (what I think) swollen lymph node in my groin. I also had a really bad big bite on my upper thigh the week I got tested. Could the swollen lymph node be from that? Thank you