@Coffeehouse22 welcome firstly
I am a mere beginner but reading your post the following occurred to me:
Willpower - cutting out what you normally eat and not replacing it with anything is the mistake I used to make too. I would say what you need is to find less calorific options that satisfy your appetite at those tricky points. Eg Lower cal crisps or have veggies and a low cal dip or I have carrot batons but I don't have them plain I pop a handful in a food bag, add seasoning (usually garlic salt, black pepper sometimes smoked paprika or another herb/spice depending what I fancy) and have those instead of crisps. I stopped buying big share packs of crisps and now buy multipacks of lower cal savoury snacks my favourites atm as I said in previous post are twiglets and frazzles but you could google "crisps less than 100 cals a bag" for ideas
On the sweeter side of things fruit is sweet and relatively healthier than chocolate, biscuits etc eg lovely sweet satsumas are 30-40 cals a go and yummy I think. Bananas are more calorific but STILL far fewer calories than say a snickers bar! Or 3! 
Cereal bars again not completely virtuous but better than scoffing a twix! I'm currently enjoying Alpen light Jaffa cake flavour or Tesco ones
I also like the muller light chocolate layers pudding which comes in a 4 pack and feels/tastes decadent but is only 69 cals a go
Even better is activia peach no added sugar low fat yoghurt at 55 cals a go and deliciously creamy
Mealtimes aim to have LOTS of veg as it's low cal and tends to help blood sugar regulation as does protein
I'm veggie anyway but even the omnis need at least 5 a day.
Lunch - I have veggies with a small pot reduced fat hummus (Tesco a 3 pot pack - plain, Red pepper or onion hummus) or a small portion of mild salsa (I can't do spicy food unfortunately) I just recently treated myself to new ramekins to pop my dips in when they're from a larger pot and I wanna weigh them out/portion control. Then the "main course" is either sandwiches (I'm now moving to one sandwich but was losing weight having 2) but I get the small 400g wholemeal loaf as I live alone and can't get through an 800g loaf before it goes off myself anyway! So small slices. I usually have 30g or less reduced fat Mayo (cannot taste any difference) 4 slices either quorn deli slices or squeaky bean deli slices (basically fake ham etc) sometimes I'll have plastic cheese slices too not always, and some slices of cucumber or mushrooms or tomato. A portion of fruit, and a kinder milk & honey slice (which is basically a teeny cream cake but only 118 cals) or a yoghurt or a chocolate pot.
Dinner -
pasta (but I weigh and have a sensible portion size now - has limited my food waste too) with veg (I tend to like cherry tomatoes, mushrooms, peppers or any combo of) and a lower cal sauce a reduced fat veggie pesto I get from a local health food place or I make a tomato and herb sauce (super easy) and I now also have some fresh basil leaves with it and some reduced fat grated cheddar of which I have less now and don't miss it as the fresh basil adds so much flavour.
Stir fry - veggies I do loads of veg for this (mushrooms, peppers, baby corn, celery, spring onions, green beans, water chestnuts, bamboo shoots...) sometimes I'll have some quorn, served with I use microwave rice (cos I'm crap at cooking rice!) but thanks to advice from the lovely posters on this thread I'm now able to use just half a pack at a time and store and use the other half later in the week safely which means I cut those cals in half! I either have simply with some soy sauce or sweet chilli sauce mixed in, if I'm having a motivated day I'll make a proper sauce or else I'll use a sachet sauce which weren't as high cal as I feared they were.
Jacket potato - recently "discovered" McCain frozen jackets which can be done in the oven as well as micro (I don't have a micro) they only take 40-50 mins in a conventional oven and the skins come up lovely and crispy. I have with this veggie chilli (sometimes home made sometimes tinned), or lentil Dahl or a small portion of baked beans or half a pot of cottage cheese with some smoked paprika and I'll have a salad with that too
I rarely have breakfast. Sometimes I'll have a supper if lunch and dinner were quite low cal and I'm hungry. Usually just something light like scrambled eggs or veggie fridge raiders or a few crackers (I like cheese thins for this) with either cottage cheese or a veggie pate or deli slices cut small on them with maybe slices of cucumber on
Look at your drinks too. Prior to starting this I was "treating" myself by having full sugar sodas or sugar in tea etc which seems small but soon adds up!
Wasn't drinking enough water either - still don't! But I am drinking more than I used to.
Also don't think of it as a "diet" because really it needs to be a permanent/long term change to how you eat and live to be healthier and fitter.
I'd fallen back into a lot of old bad habits that I knew were bad but was sticking my head in the sand about! Then my blood pressure was creeping up and gp was "telling me off" so I knew I had to get wise!
I managed to get my bp back down to a much better number fairly quickly I think I was massively overdoing the salt too!
You've done brilliant so far, just keep applying what you've been doing, figure out what motivates you and use that. It's bloody hard when they're babies to take care of yourself too but you really do have to - if only to have the blooming energy taking care of babies needs!
This thread is also really positive really encouraging