Anyone have varying cycles?

KML • Expecting #3 in October 2019

I think my body is still regulating from the iud I had removed in July but I've noticed I've had at 28 day cycle, and then a 26 day cycle, and now I'm waiting for my next AF to come. Does anyone else have varying cycle lengths when they're usually regular? I expected my period two days ago and nothing. My temps are even still high. Negative tests. Feeling confused!