Almost two years ago used this test after having unprotected sex. Tested outside window period at like 16 weeks after sexual intercourse. Test came back negative. Took no medication and waited for 15 mins and saw one line which indicated a negative result. Furthermore, about a month ago, went for a full blood count and another blood test and doctor told me everything was normal (went for this due to different issue that concerned my bowel movements). With this being said, I still feel very anxious and all this talk of false negatives makes me nervous. Should I rely on my test that I took two years ago? knowing that my test was performed properly and was negative and that my blood test which included a full blood count came back normal?