Congratulations! It is a really confusing time regarding what you can/cannot eat, but I try to just go with healthy options and not worry too much about calories as this is the one time in life it is important to get enough. This is my typical daily menu, hope it helps:
Breakfast - Porridge with mashed banana or Weetabix (semi-skimmed milk) and you can also add nuts/seeds (good fats)
Snack - fruit
Lunch - wholemeal toast/oatcakes with humous and salad or cheese and baked beans or philadelphia and avocado or french toast or soup and cheese scones
Snack - yoghurt (full fat, as a lot of low fat ones contain artificial sweeteners), fruit, nuts or dried fruit eg. prunes, apricots
Main meal - protein eg. chicken, fish, lentils with carbs eg. potatoes, rice, pasta and vegetables, in dishes such as chicken stir-fry, salmon risotto, chilli, vegetable lasagne.
I also keep a stash of wholegrain crackers, oatcakes, rice cakes etc. around which are great with cheese or humous.
Being a total chocaholic, I do allow myself a treat in the evening also. As for drinks it's water mainly (I don't like tea or coffee) and I have a glass of fresh orange juice mid afternoon with my liquid iron supplement (that way I'm taking it outwith meal times and with vitamin C to aid the absorption)
I think variety is the key, but I know how difficult it is when you are limited for time. I try to batch cook and freeze meals, so make lots of soup, lasagnes etc. which if you cook enough in one go you can then have several meals in the freezer for days when you don't have time.
I hope this helps and good luck!x