As the others already stated it looks like your hips are aslant. If you look at the lines of your abdominal, they all go off to the side.
There is also the possibility that your hip is larger on one side than the other, or one leg is slightly longer so you naturally stand skewed. If that is the case it is completely natural. People don't grow perfectly symmetrical. My head is actually naturally tilted to the side for instance. My nose deviates a bit too. I also have a few ribs higher on one side than the other. All normal.
I can assure you it has nothing to do with your injection spot, and unlikely a deformity from binding unless you've been binding your entire life, and too tightly while still growing.
Switching injection sites has more to do with allowing the area to heal and avoid abscesses or scar tissue, and avoid painful irritation in general. The hormones should be flowing about your system before they even break down.
