What are the probable causes of movement in the right side of my abdomen extending to my lower back, fast spasm like motions.

Contractions?: When was your last period? Could you be pregnant and not realize it. I experienced the exact same symptoms when i was in labor. Short of labor it's probably lumbago, or a generalized low back strain that 80% of americans will suffer at some point in their life!

See a doctor: Without a full history and physical exam, impossible to diagnose on internet. Go see someone soon and get assessed and treated.