Is it possible to skip from a regular 35 day cycle to a 28 day cycle for only a month? I was due for af today but started af like bleeding on the 18th that lasted 3 days and just didn't seem normal to me (could be wrong) I checked and I would've only been 6 or 7 dpo if my cycle stayed on a 35 day...so I'm just wondering can it jump and was that my af or did I possibly have implantation bleeding?

I took tests before because I thought I ovulated early but I'm not 100% sure. Went to doc on 10th and he said everything was 100% normal

Has this happened to anyone else

Thoughts appreciated!