I'm sorry to hear about the pain you're experiencing. Pain that extends from the shoulder to the leg on one side and worsens before menstrual periods but improves afterward, with no abnormalities found on scans and evaluations, may be related to hormonal or menstrual cycle influences rather than structural issues.

Given that your tests including MRI, uterine scans, orthopedic, and neurological assessments are normal, this pattern suggests a possible link to menstrual cycle-related conditions such as:

• Hormonal fluctuations affecting nerve sensitivity or muscle tension.
• Premenstrual syndrome (PMS) or related conditions that can cause musculoskeletal discomfort.
• Progesterone-related effects on muscles and nerves, as progesterone influences uterine and systemic tissues.

Medications like Dydrolady (a progesterone hormone therapy) are sometimes used to manage menstrual-related symptoms including pain, irregular cycles, and premenstrual syndrome. Side effects of such medications can include muscle or back pain, which might be relevant to your symptoms.

Recommendations:

• Discuss your symptoms and medication use with a gynecologist or a specialist in women's health to explore hormonal management options.
• Keep a symptom diary correlating pain intensity with your menstrual cycle to help your doctor tailor treatment.
• If pain worsens or new symptoms develop, seek prompt evaluation to rule out other causes.

Please consult a gynecologist for a thorough assessment and personalized management plan.To narrow down potential causes, we will need some more information.I understand you're dealing with right-sided pain that gets worse before your periods. To better understand, could you please share your age and gender?