When I have my project open on Krita it looks fine. But when I export it, no matter what filetype or color depth, everything dark is now a dull white color.
in Krita: http://i.imgur.com/Y6EGiVm.png
when exported: http://i.imgur.com/pFBlf0H.png
Please help me I need this exported quick,
If you cannot help me, is there a way I can fullscreen the editing window so I can take a screen shot of the image at full size?

I am using Krita 2.9.2

I don't know what this problem could be, but you can use the tab-key to get a nearly unobstructed fullscreen image.
Which Krita version is that? Maybe a newer version has this already fixed, or an older version doesn't have that yet.
Could also be not a bug but some wrong setting somewhere.
But I am not sure, I never experienced something like that before.

what is the original colorspace and channel depth of your image? It looks to me like you're exporting a 16 or 32 bits float image to 8 bit integer, going from linear to to non-linear while having "allow lcms optimizations" in settings/configure krita/color management checked.