I couldn't have eaten healthy with my first if I wanted to. I never was sick, but the thought of almost anything other than a few foods would make me gag. I lived on spaghetti hoops, french fries, cola, fried eggs, and peanut butter! Things I don't eat much (or at all, normally!) When I did eat things like salad or veggies, they went right through me. I was a slave to my multi vitamin.
Don't get me wrong, I appreciate the guidelines and the fact you *do* need to be as aware as possible of what you are eating and gaining. But I also think that pregnancy can do such weird things to you that you need to keep an open mind and go with the flow, too.