Spotting

I'm typically every 29-32 day cycle, a few cycles ago I was 42 days. I've started a new job, and understand stress can put off a period. I've beeen lightly spotting for almost two weeks. Cramps and red spotting but no period. It was due the 1st. Any ideas? My doctor thinks it could be stress related but I've had three miscarriages and over think everything