I accidentally scrunched my nose really hard 4 days post op. Could I have damaged my nose or shifted something?

Exrtemely unlikely that you have compromised the result. However, it is best to keep in touch with your Plastic Surgeon. Remember that it takes many months for swelling to settle.

It's unlikely you hurt your results, but since you're concerned, I recommend following up with your surgeon. Also, your nose and surrounding areas are going to be swollen for a while and you should be consulting the surgeon that performed the procedure but give yourself some time before going back in so some of it can subside. It can take up to a year for final results.
Sincerely,
Philip J. Miller, MD, FACS Double Board Certified Facial Plastic Surgeon

It's unlikely you negatively impacted your results. However, if you're concerned, I recommend following up with your surgeon. Keep in mind, it's still too soon to tell what your final results will be. You need to have patience with your body as it begins to heal. The skin, bone and cartilage are all traumatized during surgery. Inflammation (swelling) is the normal response and will help your nose to heal and look beautiful in the end. If, one year from now, you are unhappy with your nose, then that is the time to think about a revision procedure. Right now, concentrate on other things you like to do and let your nose take its time to heal. I hope this helps.