Spotting?

For the past TWO weeks, I’ve had spotting like a very light period. But I’m not sure if it’s period because i usually have normal to heavy flow and also I started spotting a week after my last period ended. I’m wearing pads because there’s not enough blood that a tampon could even soak. I am not on birth control, I have not changed anything in my diet or life. The only thing that’s been different is that i have been writing a book the past month and its publish date is coming soon so I’ve been rushing to finishing it and I’ve been stressed. Is stress the reason this is happening? I have no period symptoms, just light blood.