...what's going on is that you're in the biological transitional phase known as
Peri-Menopause. Changes in your menstrual cycle and menstrual period can vary tremendously. Cycles may be longer or shorter or fall into a "no-pattern' pattern. Menstrual bleeding may be heavier or lighter, more prolonged or shorter, or entirely absent. Variable and declining hormone production is the cause. I've been going through the same thing, myself... and, I totally empathize! "i"
Perimenopause. Your period might come and go irregularly for a while.