I have been using a fertility tracker app since I came off the pill in June. According to that, my period was due on 9/11/17, making a 29 day cycle. I tend to be longer than that, and had worked out my own date as being 15/11/17. As of today, I am either one, or two, weeks late, depending on which date I measure by. I am feeling nauseous in the mornings, have absolutely no signs of coming on any time soon (usually its really obvious from a week out!), and generally just don't feel 'right'. Every pregnancy test I have taken has said negative. I have an underactive thyroid, which last month at my annual review came back as fractionally overactive for the first time. I have a drs app next week to discuss thyroid, and am planning on asking for a blood test if I'm still getting negatives. I did have some very slight spotting at the weekend. Could I be pregnant even with all the negative tests?