Hi and thanks for the query,
Pain just before period might be certainly of inflammatory origin. The association of this pain with menses is actually a rare, but possible association. Doing an X ray
of this region, coupled with markers of inflammation to ascertain the actual cause might b very necessary. Consulting your rheumatologist
and gynecologist for proper evaluation and determination of any possible links might be necessary. An abdominal ultrasound
might be necessary at some point in your evaluation.
Thanks and best regards,