<s>[INST] Good afternoon, Last night I waked up in the middle of the night with a burning, cramping sensation on my LLQ for about 20 Min, so bad that I went to the ER. The waiting time was about 4 Hrs, and I notice that the pain when from a 10 down to a 4 so I decide to go home. I feel right now a funny sensation on my left side. I am worry. Any ideas. thank you for your time. [/INST] Hi, Possibly some ureteric stone or  intestinal infection  which seems to be settling down. Worthwhile getting a urine examination, ultrasonography of abdomen done to determine the cause since the pain was severe. Hope this answers your query. Wish you a speedy recovery. </s>