Weird AF after TTC?

Jessica
Hi everyone! I wanted to know if anyone else has has this happen before. My husband and I have been TTC for the last few months and in October I ovulated and then a week in a half later I had some spotting for a day or so which I thought was implantation bleeding. I then got my AF about a few days later, but it's been strange. I normally have mine for 7 days and its pretty heavy for the full 7. I ended up only having 1 somewhat heavy day and then very light spotting for 3 days. I've never had any changes like this before. Has anyone experienced changes in AF like this before? I appreciate the feedback!!!