My foot and leg are going numb????

About 2 days ago, I bent over to pick up my daughter and either a.) Pulled a muscle -or- b.) Pinched a nerve in my back. Extreme back pain, whether I was standing or sitting, didn't matter, ensued.
Today, the right edges of my right foot became partially numb (I'd say 60%) and as the day has progressed, portions of my leg have begun to feel a slight numbness (maybe 20-30%) and my calf has become very sore and weak.

What the hell is going on with me?

The back pain has partially subsided, but the foot and leg numbness and calf fatigue is worse. I'm not in extreme pain, but I'm now limping. Is this something I should seek IMMEDIATE medical attention for, or is it a common thing that will clear itself up?

Has anyone else had symptoms similar to these?