When EXACTLY did pain start?
Is it constant, or intermittent?
Do you feel any lump/swelling/mass when you palpate the site?
Any GI symptoms [gas, nausea, heartburn, bloating]?
Any urinary symptoms [frequency, burning, blood]?
Is it CLOSER to the side [just above hip], or closer to abdomen [more medial]?
Once you've answered these questions with clear, well-thought out answers, I will reply with my opinion. Your answers will enable me to get closer to an accurate assessment, which is critical to obtaining successful treatment or cure.