Don't worry about the protein in bread - many foods are some combination of fat, protein, and carbs - even broccoli has protein. Keep it simple for yourself. One thing about the dinner portion of bread: we had some errors in the book, unfortunately, and it should be three slices for women for phase I (and 2 slices for phase II):
http://www.serotoninpowerdiet.com/errata.php. My apologies for the errors but I'm thrilled you had such a wonderful first day! I shouldn't necessarily promote this, but sometimes out of sheer hunger you may just want to eat the four slices of bread rather than three, and, if you are able to lose weight, no harm done! Just watch the scale, your mood, appetite, energy levels, etc. and eat accordingly.