Campus days, late labs, and the hunger cues I'm relearning

I'm a sophomore carrying 17 credits and a 20-hour campus job. Before my prescription, I used to skip lunch, then crash through a 4 p.m. seminar and raid the vending machine. Now my appetite is much quieter, which is mostly a relief, but I'm noticing I can go too long without eating because nothing shouts at me. The other day I got shaky halfway through a chem lab and realized I'd only had coffee and half a bagel since 7 a.m. Since then I set two alarms—11:30 for a real lunch, 3:30 for yogurt or nuts—and I keep a water bottle in my bag. It's not glamorous, but tracking how I feel before and after meals has helped more than any fancy routine. I'm still figuring out how to handle stress eating during finals without overcorrecting. For those in school or similar high-demand schedules, what gentle reminder works for you when your body stops sending loud hunger signals?