TTC and cycle change

Has anyone experienced a complete cycle change while ttc? 3rd month and instead of having a cycle the 3rd week of December, it switched course and now I’m due 1st/2nd week of the month. Did that throw off the time it took for you to conceive? I’m trying to not count this month as a possibility (hard) just because I know my body is still probably processing the change, however I’m certain I did ovulate. Just looking for similar experiences and input.