Adjusting period/ovulation times?

Jane • PCOS - Baby Boy born Jan. 2022 💙

So I’m trying to track my ovulation. Glow has it at a set 28 days but I’m starting to see more of a 33-35 day cycle. I put it into glow and it said that it wouldn’t adjust until my next cycle if that sounds right?? Just trying to figure out when I’m ovulating. I check my mucus and I’m thinking about getting some ovulation strips. Any suggestions?