Since the 23 I have gotten faint positives on 4 different brands of tests the old frer, the new frer, clearblue, and target brand. They ALL have been positive with very faint line...line has not gotten noticeably dark. Went to get blood drawn this am they called back said it was negative...I went and bought another frer and clearblue to see if it would show negative and they both are still faintly positive...I'm so confused. AF was due the 23 and nothing. Please help!!