I am currently 3 days late. I have never been over 38 days between cycles. I'm 41 today. I have take test leading up to my predicted cycle. All BFN! I have taken; clear blue digital (2), Dollar Tree (4) and all we negative.  I have had this weird congestion and cough, yesterday and today I feel nausious, headaches, slight back pain. I bought the FRER today haven't taken it yet... Don't know what to do. Am