Thank you for sharing your question.
If you feel the timing of the symptoms are likely not PMS, it could be an indication of something else.
Is this the first time this has happened? Or have you experienced it for some time now?
It could be associated to your hormones fluctuating. But anytime we have pain, our body is trying to tell us something.
It might be a good idea to discuss with your doctor and to get in for an exam. Just to be safe.