I've heard of this way of eating and I think I tried it years ago, this was before eating organic. I don't remember any benefits but I was also over exercising, not sleeping well, restricting calories, etc. so my results wouldn't mean anything anyway.
I've had problems with digestion almost my whole life. It has slowly improved to a point where I would declare myself digestion problem free today.
I haven't looked into it too much but there are also many people who disagree with this food combining diet saying it makes no difference and some people say it's actually worse for your digestion.
I've never been healthier and I mix protein and carbs at almost every meal. Is it really possible no nutrients are making into my body? I don't think so.
This diet might help people with damaged digestion to recover but I don't think it's a long term solution. Some people can't handle eating certain vegetables, some people can't handle wheat, some people can't handle dairy. Does that mean these foods are bad? Of course not, these people need healing. On that healing path they may have to be careful about what they eat and when but it would be silly to assume everyone should eat the way they do because those certain people suddenly feel better.
I won't discourage you from trying it but would encourage you not to stick to any "diets" that make your life miserable. The planning that would have to go into this kind of diet would drive me nuts. Not being able to eat hamburgers? No eggs and toast? I'm out.
It makes me wonder where beans fit in? They have quite a bit of protein but are also carb rich.
Constipation is a common pregnancy complaint. The hormone shifts happening in your body can cause any number of discomforts. Unfortunately loading up on fiber and iron will only make constipation worse.
One thing I will recommend to anyone for general good health is to eat fermented foods. Fermented foods such as raw sauerkraut, kefir, and yogurt can help heal poor digestion. Have you tried sauerkraut, Marina?