Is it normal to have shock/denial/regret after Rhinoplasty? How long does it take for patients to adjust to their new look?

Your nose has likely looked the same since puberty. You are used to seeing the person with your "old" nose.  It is not abnormal to feel strange or to be shocked when you see a "different" person looking back at you in the mirror. It sounds like you are happy with the changes in the shape of your nose since your surgery. I think that it won't be long before you have acclimated to the changes in your nose. You are the same person - you just have a new and improved nose. If you find that you are still distressed, discuss your feelings with your plastic surgeon.

Yes there is a real phenomena patients go through after a facial surgery. Give yourself time and discuss your feelings with your surgeon. Congrats on your improvement 

Yes, it’s normal to have an adjustment period after cosmetic
surgery when you are getting used to your results and yes, you are still the
same person. At just a week after
surgery, you need to give yourself time to get used to seeing the new you in
the mirror. In my experience, the mind
usually takes 3 months to incorporate your “new self” into being “you”.

Yes, these feelings are normal after any surgery especially a cosmetic procedure that changes a facial feature, discuss with your surgeon and know these feelings will pass .

Any time you alter your appearance there will be an accommodation period.  Generally this can last up to 3 months.  If it is causing you distress talk it over with your plastic surgeon.