2-3 weeks in, progress stagnated

(Just as a note, I originally made this post on a throwaway that sadly didn't meet karma requirements because there are assholes that stalk my main profile.) Hello! (19M, 181 cm/ 5'11", 109,5 kg / 241 lbs) here! I got into IF about two to three weeks ago, after a friend recommended it to me. My weight has always been a problem for me, since I loved to just stuff my face full of some junk after school (and honestly, with how much trash I ate, my weight feels like a low end). I couldn't keep diets, and as many times as I tried exercise (I'm almost completely sedentary, yay), I just couldn't get into it. IF sounded pretty good, so I figured, why not? Progress was actually pretty nice the first few days, I started out at 116 kg (though that was a measurement in the middle of the day, so I feel like something more accurate would be 112-113), and, well, have lost about 3-4 kg since. At first, I felt great! The issue is, that has badly stagnated after the first few days. I actually gained 0,3 kg in the last two days. I don't follow any strict diet, I live with family so the grown ups do the cooking, but any trashy dinners like pizza or McDonald's are nonexistent. I will admit, I do have a tendency to eat something bad, but I can discipline myself with it, I'll have something like a hot dog, or maybe like 6 Pringles, a cookie after a meal and that's it, I've only really had a cheat day once. Do my numbers really look that bad or am I just overly anxious about it? Any input helps.