My gridlines and everything else disappears when I zoom in Scene window. 2D

I've been working on a project for a 2D game and everything looks fine in the Scene view window until I zoom in to a certain point then everything disappears including grid lines. It is only a grey with no gridlines. It just looks like emptiness. I have played with the z-axis, turning all my layers off except my main camera, and I've tried some other things in posts dealing with the 3D aspect of Unity but nothing specific enough that can help my problem.