I'm starting to be very worried that I'm having a chemical pregnancy. According to this app I'm 4w 4d and the faint lines I was getting are only getting fainter. I've yet to get a positive on a digital test. This situation is even more devastating because we lost a baby at 18 weeks in October. I hesitate going to the doctor before my March 1st appointment because there's nothing that can be done if this is in fact a chemical pregnancy/early miscarriage. Is anyone else experiencing this too?