Horizontal Movements for Zooming In and Out

Hello!

So I've had this issue with multiple of my Adobe programs - usually I am able to zoom in and out using which way I horizontally move my mouse (clicking and dragging right will zoom in, and dragging left will zoom out) but I have seem to hit some keyboard shortcut so that no matter which way I click and drag my mouse, it will extremely zoom in on the selection.

What is the shortcut to return my zoom to normal! I'm so accustomed to it, and now it's taking twice as long to accomplish anything.

Thanks so much!