Not hungry at all, than suddenly starving 😭

Not sure the tag fits, but it is about eating, lol.

I can feels absolutely not hungry at all, up to the point of not even being able to eat a snack because I feel nauseous just thinking about it... but than 10 Minutes later I get into my car to go to work and suddenly I feel like I am starving. But now I don't have anything with me or time to grab something before work (I work with food, so I could also grab something from there, so I actually would never be in much trouble not bringing anything, but that food isn't exactly healthy).

Not sure anyone can help me, but maybe someone has an idea anyway. I absolutely hate it, I check my body if it wants something to eat, body says "no" and then 10 Minutes later it yells "I AM HUNGRY NOW" like I didn't ask for hours... my body behaves like a toddler. 😭😭😭