I Went And Got Tested Three Weeks And 5 Days

I went and got tested three weeks and 5 days after possible exposure. When I went my cycle had just ended about 2/3 days prior to so I was barely spotting, i only knew I was spotting because of the swab test. I also took an urinalysis. All my test were negative. I just want to make sure that the test were accurate even though I was spotting. Also that I went at a good time to be tested.