A buzzing feeling on front pelvis, on left side of pubic area? I might have Si joint prob or pirformis sydrome, could any of these cause it or not?

Pain. Less likely to be SI joint and not at all likely to be piriformis syndrome. Sometimes the SI joint pain may radiate to the groin area but would feel like a deep dull ache. It would increase while bending forward and esp getting out of a chair. There may be tenderness in the back. Please inform us of any aggravation and relieving factors, any other symptoms. That may get you better answers.