and I'm wanting to count all the globs of paint.
I assume your globs are just composed of pixels, made with paint tool or whatever? If so, they are not "objects" as in a vector drawing program.
PS does not have "objects" (except in the case of vector shapes/fonts). Every area of the image is just composed of pixels, b/w pixel, colored pixel, transparent pixel, each is equal in area.
As mentioned before, you can select pixels by various methods, and Histogram will tell you how many pixels are selected. From your total pixel number of the image, you can then math your way to what %/size of total picture area these selected pixels comprise. But 300 pixels which make a paint glob is not seen as an object any more than 300 pixels of a white expanse.
M