If/how to complain about wait for bladder biopsy results

I had a bladder biopsy in early July and didn't hear anything about the results. I was still seeing Urinogynaecology for other appointments about the same condition so just assumed that if anything had been found, they would bring it up with me.

I just had an appointment on 11th January with the consultant who told me the results (chronic bladder information). I feel like six months was a very long wait - would I be justified in bringing this to someone's attention and if so, how best should I go about this, please?