Wow a baby on the way, how lovely 
I think a few people here have done low carb very successfully during pregnancy but you do have to decide for yourself if it's for you or not, as it's important to have the courage of your convictions.
About dinners and feeling like it's not a meal without carbs, you definitely do need to make the effort to actually cook something for yourself rather than just having 'meat and sauce', otherwise it can quickly become boring and samey and not enjoyable at all. Loads of great suggestions already, I see, but here are some of mine:
For fajitas/chilli/Mexican/etc, I use gem lettuce or iceberg lettuce and use the leaves as wraps. Luckily the sides go so well with the low carb woe - sour cream, salad veg, avocado/guacamole, cheese, etc. It honestly is just as good, if not better, with lettuce as the wrap instead of a tortilla, so you don't even miss it.
I do like courgette strips in place of pasta once in a while but my favourite accompaniments to Italian sauces are courgette sliced and fried in lots of olive oil with garlic and chilli, or a roasted half (or two) of aubergine. Just as tasty, and definitely a full meal.
For roast dinners I do roasted celeriac. Or celeriac mash. Or a celeriac gratin of some sort. So delicious.
As an accompaniment to a good steak or a few slices of roast beef, there's nothing much better than nigel slater's celeriac remoulade. Soooo good.
Curries and s.e. Asian meals - cauliflower rice, or curried cauliflower and spinach, or broccoli with garlic and soy sauce, or pak choi, and so on and so forth.
With baked fish, I love fennel, either baked along with the fish or poached.
With a burger, I have a pile of mushrooms and shallots gently fried in butter, plus a green salad or some veg on the side. I've found that onion and garlic dip makes a great relish in place of mustard and ketchup.
With peri peri chicken I have a big serving of roasted mediterranean veg - peppers, courgette, shallots, tomatoes, garlic and so on doused in loads of
olive oil.
And on and on it goes
It does take some time to get used to making a side for yourself, but it soon becomes habit. And quite often now my daughter will just have my side rather than a serving of carbs, so it benefits us both.
It's a great way to introduce more variety, actually, and I love trying out new recipes.