Sounds like the starting place is a good assessment of the pelvis. Have a look at the levels of the ASIS, PSIS, Pubic Symphysis, Flare of either inominate from a central axis (use the naval as a guestimate of midline in the absense of any lateral shift). Then look at whether any of this changes between sitting, standing and supine.
Next look at apparent leg length and also internal and external rotation of the hips and compare sides in supine and with the hip and knee at 90 degrees. Note and difference in all of the above and get back to us.
As you are recently graduated perhaps have someone about during the exam as you will have to palpate in some rather personal regions of the girls body (just to be safe) and explain clearly what and why you are doing things.
Get back to us on the results and don't at any cost let he have another injection. My ex. did the same, tore of a hamstring insertion and ruined her professional ballet career.
Once we work out more clearly what's going on then we can investigate potential reasons why.