Hello after sexual exposure I started worrying about catching hiv so,I did pcr and combo test after 3 days then it came negative after that I search through the internetn, I found it is not the enough time to do the test,so the bad thoughts that I have hiv return back I start then searching about the tests window periods I found that it is quite enough to get tested at 4 weeks and it is conclusive I took the combo test and also came back negative but also I still worrying too much Is it enough