My Color channels seem to have messed up

Hello yall, I was planning on rendering earlier today when I encountered that i had a pink layer covering everything. I don't exactly know whats causing it, but I suspect its the channels and it only happens when i merge my postcard and 3D extrusion layer. If anyone knows what is happening please assist, I've never messed with my colors, i even reset photoshop to see if it would fix it and it did not.