I have very fair skin. VERY fair. As in, I'm normally lighter than the lightest shade of most foundations. When I try fair foundations, they're either too yellow or too pink, which is weird because I have both yellow and pink undertones in my skin. If I'm hot or flustered, I get pink, but when I am tan or have a bit of color to me, I'm yellow, so I don't know what kind of foundation I am supposed to go with. And then there's the qualm of whether I should match it to the color of my face or match it to the color of my chest and just bring the foundation down my neck. Any tips? I'm just frustrated. I feel like I have been looking for the perfect foundation forever and I just can't seem to find it.