Eraser / brush tool not working properly in Photoshop (Windows)

So I'm sure this is just a setting I hit but for the life of me I cant figure out why by brush and eraser tool only functions on a single click, not painting.  When I place my eraser or brush and and right click it effects that single spot but when I click, hold and drag it doesn't do anything beyond the first spot.  To erase or paint anything I have to click, move to new spot and click again, move to new spot and click again, and so on.

I've tried resetting the tool, reseting all tools, still nothing.  Any help would be appreciated. 

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