Are my cycles irregular? Currently on CD 39...

I had longer cycles when I stopped birth control. They were 42, 38, 39 days. But then the next was 33 days. Then I had a miscarriage. My first cycle after the miscarriage was 34 days so I thought they would continue to be shorter.

But here I am the next cycle on CD 39, negative tests and no AF. I don’t know when I ovulated this time because I wanted to de-stress by not using opks in December.

Not sure what to do. I guess I’ll just keep testing. When I got pregnant in September I didn’t think I had a chance of being pregnant, so I didn’t even bother testing until CD 40 and got positive on both FRER and digital, but I know I ovulated later that time around CD 27.