can negative change?
Hello I had sex the first week of April I got tested in a clinic on May 8 they took out blood an urine an send it to the lab. Everything came out negative. Then I took a insti 1 minute finger prick test the last week of May an it also came out negative. So I went to take another test same one the insti 1 minute test but that was at day 74 an it came out negative what are the accuracy of this test an what’s my accuracy me still staying negative at day 84 or 90?? An can I negative change?