Period 1 day after ovulation

Anna
I've been off the BCP going on one year next month. Started TTC a few months after that. My periods are not regulated.. Meaning anywhere from 19 day cycles to 55 days. I started ovulation tests and do them on and off. This month, however, I got a positive ovulation test on Thursday the 31st and then got my period on Friday the 1st. So confused!! Im still under 35, so I know I really need to wait a few months for it to be a year, but I feel like I'm wasting time if my cycles are so out of whack. Has anyone experienced this? Anything I can do to regulate?