I have had four diagnoses of life changing conditions and I have to admit that with each one I went through a period of this. I think that it can be a normal reaction for a lot of people and just takes time to adjust and to get back to a semblance of normality. Type 2 Diabetes and the good management it requires means that there can be a lot of changes to one's daily lifestyle that one has to get used to in order to realise that we are actually lessening the risks of complications. Give yourself time.
One final thing, never ignore a new symptom thinking it must be just another 'Diabetes thing', if it lasts more than a couple of weeks then see your GP. Not all things are Diabetes related.