I have no idea whats going on with me

let me say something first. I dont wanna lose weight. Im fine with the way I look! Im not depressed either

but, honestly, (i cant even how long this has been going on. Years or months, I dont know. Never paid attention) some days, like maybe 5 times per month, my appetite will dramatically change. Like, I mean, most days I eat normal. I have a normal appetite. But some days, I can never feel full. And some days I could go through the whole day without eating. Im just not hungry. Im not trying to not eat. It just happens. And its odd!

Also, one time, when I was a child like 9 I dont know, I lost my appetite for a whole month or more. I was so young, and I just stopped eating. I lost so much weight and my mother had to force me to eat everyday. I just didnt see anything appetizing about anything. I cant remember if it was depresion or something. I dont remember.

Help me! Isnt this odd????????