You’ve done super well by changing your habits and switching healthy alternatives in. But without tracking calories and macros you’re really in the dark. It’s so easy to eat more then you think you are, I’ve been there I’ve lots 120lbs in total (60lbs of that in the last 18 months post partum) and I’m tall so I know how hard it is when you first start. Just to give you an idea of what you’ve eaten I’ve done a rough estimate below.
Breakfast - did you use water with the oats or milk? Average portion of oats alone is 40g which is 150cals, fat free yogurt around 80 cals, banana around 80 cals, bread and low fat spread depends on the type and weight of both but let’s say 200cals
thats 510 cals for breakfast if you added just water to your oats and didn’t have tea or coffee etc.
Lunch - pasta salad (home made or store bought? What is in it and what’s the weight of the pasta and sauces? Any protein like fish, meat, eggs etc?)
let’s say it was store bought and around 400cal
roll without butter is 200 cals give or take
Low cal crisps about 100 cals
700 cals
Dinner - home made spag Bol (what meat fat %? Home made sauce or jar? How much spaghetti?)
let’s say it was the average portion of 120g COOKED pasta 150cals
meat sauce was 300cals
any cheese in top?
this gives you a basic average portion for 450cals
The garlic bread ( a small standard baguette) is roughly 75lbs a slice so that 150cals
weight watchers mousse - couldn’t find so picked a low fat chocolate mousse that is 80 cals
fruit - 50 cals
so that’s 730 cals for dinner
snack - 2 biscuits (let’s say bourbon) 60 cals each 120cals
that’s equates to 2060 calories roughly. Without knows actual macros it’s all guess work though. You could have had smaller portions, had water all day, not had any other snack, had a smaller banana etc
or you could have had bigger portions, used oil in your cooking, had thick cuts of bread with lots of spread, had drinks with calories, added milk to your oats or butter to your roll.
you get the point I’m sure, it’s all about numbers with weight loss. You need to weigh and measure and track. Your previous calories look like they were gaining weight calories, so you’d have been slowly putting on body fat. Whereas these might be very close to your maintenance calories at your height depending on a few things