My nose looks like a potato sometimes. Why? (Photo)

You are not crazy, just very in tune with your nose. Not only does the nose change with weeks and months and years. A whole bunch of factors affect its appearance including sun exposure, water retention, light, acne, skin hygene, moisture, etc, etc... If you take into account all these things, it is easy to understand why it may look different at times. Hope that helps.

I like the shape of your nose and would not recommend any change. Please follow up with your doctor as these issues require the attention of a plastic surgeon.

The appearance of your nose can change according to many factors including fluid retention, hormones, sleeping position, lighting in the photographs and post operative swelling which can persist for up to 12 months and fluctuate depending on your level of activity.  From your photographs alone you appear to have achieved a good result.