Wondering if this is normal...

Ladies, I was diagnosed with PCOS by ultrasound about 6 years ago. Though somewhat unpredictable, I get periods EVERY month but lately, my periods have been quite irregular. I didn’t get a period at all in October and was a few days early last month. I was due on the 1st or 5th of this month with no period yet. Have any of y’all experienced something similar? Where you are pretty regular and suddenly stop being regular? I don’t consider myself to be feeling anymore stress than usual and though I have gained weight, it has been gradual. I also had my thyroid checked in September which was normal. My husband has a Vasectomy so I am pretty sure I’m not pregnant. I don’t have any symptoms and had a negative pregnancy test a few days ago. Any ideas?