I have been getting dizzy feeling like everything is spinning around me randomly. especially when i am sitting.. what can it be?

Vertigo: vertigo describes the symptoms you are having. Many causes for vertigo. Some include ear infections, allergies, heart conditions, position changes can exacerbate some of the spinning in some people. See your doctor for a diagnosis. Simple treatment options include meclizine, other medications, or some position exercises depending on what is causing the vertigo.