Well done on your three days in!😃
I am not a dietician by any means, but I have been where you are, so these are simply my humble thoughts. .
Eating eggs, meat and cheese, in moderation, can be part of a balanced diet. However, like you mentioned, we can overdo it, especially with the processed meats like you will find in the 'ready meal' section in most supermarkets, which can have a lot of hidden salt and sugar. Or the high salt content of cheese. which means popping that last part into our mouths when we come to the end of grating a mound of cheese (and still eat the grated cheese while we are preparing a meal with it) can have an impact on water retention. If you find you are eating them several times a day, maybe think about changing one meal each day.
Protein is an essential nutrient for the body, a lot different than processed sugar with no nutritional value which you can effectively do without, so the change should be based around 'substituting' meat for other good sources of protein and possibly reducing the trio, if you believe you are overeating.
Meatless meals
This is a good site for actual meals that you can cook.
137 Vegetarian Dinner Recipes | Good Food (bbcgoodfood.com)
This one has many from various cultures.
82 Vegetarian recipes from around the world - delicious. magazine (deliciousmagazine.co.uk)
I am not a fan of 'processed meatless meats' as it can, at times, have far more 'unsavoury' additions other than high salt and sugar for taste, than if you had processed meats. You don't want to go from the frying pan to the fire - just my own personal take.
Cheese portions
Reducing the amount you have in terms of portion size. Example, Cathedral cheese is a 550g packet and is supposed to have 18 servings.
Cathedral City Mature Cheddar Cheese 550 G - Tesco Groceries
I know with my hand on my heart, it could eat a good 1/3 of a packet of cheese with ease many years ago (I can go weeks without it now, and maybe a slice here or there).
Maybe smaller serving sizes can be an alternative.
Cathedral City Mini Mature Cheddar Cheeses 6x20g | Sainsbury's (sainsburys.co.uk)
This is a brief but good read.
Size matters: portion sizes | Diabetes UK
Eggs
I tend to eat them several times a week: usually scrambled in water or hard boiled. My DD makes the best 'egg muffins' (onions, tomatoes, olives with herbs) and are baked in the oven. Sometimes, I can go without them for a few days, and then I will reach for them in a bind, as they are the ultimate fast food. Have a look at how much you are eating (and how you are preparing them i.e., fried), and maybe think about what you would do to scale back for your own personal needs.
Here are a few articles that I found interesting.
Eggs and cholesterol - BHF
New Study Finds Eating Eggs May Not Increase Cholesterol Levels (healthline.com)
Egg limits lifted | BEIC (britisheggindustrycouncil.com)
This one is an interesting read.
Does eating eggs increase my risk of heart disease? - BHF
This was an interesting article. However, it was funded by EIC. It states,
'This research and the APC were funded by the British Egg Industry Council'.
So take its findings with a large pinch of Himalayan salt.
Eggs: Healthy or Risky? A Review of Evidence from High Quality Studies on Hen’s Eggs - PMC (nih.gov)
This article was a good read, but also has little 'conflicts of interest' showing its head (see before the references).
Eggs: good or bad? | Proceedings of the Nutrition Society | Cambridge Core
Just a few thoughts.🙂