Anyone have disruptions in sleep habits prior to TN diagnosis?

A few years after my first diagnosis of TN BC, while doing a research proposal involving circadian rhythms, I came across a study in the medical journal, The Lancet. It detailed a high rate of breast cancer in Finnish female flight attendants. What the data suggested was that disturbances in biological rhythms and melatonin are involved in breast cancer. It really struck a cord with me, because I am a rigid morning person, who doesn't do well if I can't maintain my regular sleep routine.

And, I suddenly realized that, for at least 8 months before the lump appeared on my mammogram (which I put off having biopsied due to a rigorous travel schedule), I was not only traveling back and forth across time zones constantly, but I couldn't sleep well at home. My upstairs neighbors were keeping their dogs in the bedroom at night so they wouldn't disturb their new baby. Plus the next door neighbor put in a really bright motion-activated light over his back door that flashed on and off into my bedroom window all night. It was a convergence of things that left me sleep deprived for almost a year.

I woke up the other morning (13 years later) and realized that I have been traveling for months at a time again this year, with no break in between. I was absolutely shocked to get a repeat diagnosis for TN bc in the opposite breast after all these years. Like so many of you, I don't fit the usual demographics (66-yr-old Caucasian woman with no history of any kind of cancer on either side of my family, all of whom have lived well into their 80's). This is the first year since 1999 when I had my first diagnosis that I have traveled across so many time zones and had so many months of sleep routine interruption.

My son died four years ago of ALS. Like that disease, I realize that there are many triggers for TN bc and that they are all individual to our genetic codes. No one knows what triggers ALS for a healthy, vibrant 37 year old man. But just as that disease is on the rise, so it seems that TN bc is increasing. To me it is just common sense that there are environmental triggers and personal habit triggers that didn't exist 50 years ago. I certainly think that light pollution, noise pollution, and any number of the triggers people have mentioned here are worth exploring.

I'd love to hear if anyone else experienced disruptions in their circadian rhythms prior to their diagnosis. (Sorry for the long post).