Cycle days keep changing issues!!!

My cycle has been a 29 day cycle for years now! Unfortunately, the last couple months they’ve changed. In May my cycle was 3/4 days late and then in June it came one day early. I was meant to come on yesterday but still haven’t. Hoping my period late as I’m expecting but feel really run down and tired and got a gut feeling it’ll show either tomorrow or the day after.

Anyone else ever experienced this in there cycle? And have they found it difficult to conceive?

I have been doctors about this but they said it’s normal and they don’t suspect any problems with my periods.