I don't consider this strange, I would consider this a good thing, your body is creating a life right now, think about it. So while creating a life, your body is rejecting the idea of eating death which so obviously is what eating flesh is: cow, chicken and fish all die to be on the plate, not by choice either.
This is a perfect time to read up on healthy things to eat. I know you mention protein but the protein myth was created by the meat industry. Unless you're a big bodybuilder, you do not need as much protein as you are lead to believe. That being said, I know several vegan body builders Robert Cheeke being one. Not to mention, did you know that Mike Tyson has become vegan and Bill Clinton has adopted a plant based diet? Protein needs can easily be met through grains, veggies, nuts, seeds, legumes, etc.
Calcium needs are much better met through sesame seeds, green leafy veggies (which you should also eat to produce good nourishing milk for your baby once born) and seaweeds. Wakame, nori (used for sushi) are rich in many minerals: iron, iodine, calcium, phosphorus, magnesium, b vitamins etc. Sushi is easily made at home with brown rice and whatever veggies you'd like.
Have you tried tempeh? It's a fermented soy which is much healthier than tofu and it's got b12 in it. Miso is another great thing to add to your diet. Rich is all sorts of nutrients you need, keeps your blood sugar levels even and tastes great. There are many types too, also helps with nausea and sickness.
Also, stay away from sugars as they rob the body of essential nutrients.
Weight loss is created by altering diet to a healthier balance. Take away processed foods, flours and switch to whole grains, no dairy as it makes you fat (dairy is a source of growth, females create this to nourish their offspring, cow milk for calves, human for our babies, elephant for calves, etc) and sugar makes you fat too.
Eat a diet filled with fresh whole grains, lovely different veggies, nuts, seeds, beans, and some fruit and you will be happy, healthy and trim.
What type of recipes are you interested in? What flavors do you like? The Physician's Committee For Responsible Medicine has some great resources. Here are their recipes:
http://www.nutritionmd.org/recipes/advanced_search.html
http://www.vrg.org/nutrition/pregnancy.htm
http://www.vegfamily.com/vegan-pregnancy/index.htm
good luck and pm me if you'd like for info, I'll gladly help out!