It was quite awhile ago when I posted the question
"What do you eat when you don't want to eat?" Since then, I've learned a few more tricks that might be useful for anyone who's lost their appetite due to pregnancy, chemotherapy, whatever.
One is to make the most of whatever you can manage to get/hold down. So if you're not getting all the fiber or protein you need, you can spike your food and drinks with products like Benefiber or Beneprotein. Here's what I know about those.
You can buy
Benefiber at any drugstore.

It dissolves really well in liquids. They say you can't event taste it in water, but I haven't tried that.
Beneprotein has kind of a powdered-milky taste. One time I got confused and thought
that was the one you could dissolve in water, so I tried it. Pretty nasty. Don't do that. What you can do is mix it into any beverages or soft foods that are dairy or go with dairy - so yogurt, oatmeal, smoothies, cream of wheat, tapioca, peanut butter, cottage cheese, etc.
Another thing you can do....

take some eggs

add Beneprotein
while they're cooking

scramble it all up

and when they're done, you won't be able to tell you added anything. (Also, see how I put the eggs between the English muffins - makes it look like less food. ;) )
Beneprotein is harder to get in stores but you can order it on
Amazon or
Walgreens.com and probably other places online as well.
Ok, before I go, I should disclaim some things.
Disclaimer: Here is where I tell you to check with your doctor before trying anything new - especially if you're pregnant. If you choose not to do that and something goes wrong, you can't say I didn't warn you. I'm doing that right now.
P.S. Sorry my photos are so blurry. I was trying to scramble and shoot and stir all at once and fast. Not a good combination. I promise to slow down.