Are there any before and after pics that use a medical image overlay, where the ridge of the nose and ear are aligned.
All the pics on this form are from different angles and distances. I've been practicing proper tongue posture for many months and after properly overlaying them on photoshop, it's identical.
Probably the closest you'll find to something that standardized are the before and after pictures from myofunctional therapists, but even these have issues with head rotation, etc. Here's an example:

progress posted his 2 years of progress pics and in 2 years the changes where substantial but you wouldn't be able to tell without before and after pictures from the same angle i doubt in your few months you'd see anything crazy