Injured Low Back 2005 Quickly Lifted 35pound Child Swing Over

injured low back 2005 quickly lifted 35pound child swing over my right sholder felt pop. have lifted, pulled, pushed, very heavy pt's. when I worked. pain has got worse running down my left leg back and inside of leg foot tingles and numb heal also hurts to step on. 2 wks go turned bent over pain shot down right back of my leg, legs now weak and tingling saw md today. what do u think is going on with my back?