Signs of anovulation & PCOS

Obviously I know the biggest sign of anovulation is not getting your period. What are a few of the other signs?

I am a person whose mind runs rampant when I know something is changing and I guess I kinda wanna simmer my fears lol.

The last 3 months, my periods have been shorter than normal. Like going from 5-6 days to 3-4 days.

I’ve also noticed darker than normal hair growing around my breasts & have heard that could be a sign