The past 2 days i've been having sharp pain at the top of the left and right of buttocks. hard to walk or move. it happened before but not this bad.

Sacroiliac joints : Sounds like you have strained your lower back/ sacroiliac joints. Rest, ice use NSAIDs. If pain 10/10 get full history and physical. Pain shooting down the leg or weakness ups the tempo of the consults needed to immediately. Any incontinence or loss of feeling is a 911 emergency fur cauda equina syndrome. Along the differential is abdominal pathology like appendicitis so see MD if pain severe.