Weight problem

Even though I ate a few eggs per day in Thailand, I lose 1 kg. Oh my god. Maybe cos I ate only one egg on the last day ?!?!?
Managed to gained back tt 1kg cos I resumed my four meals per day. My metabolism is crazily high. Thats why I cant go exchange! Aiming to add more weight. A very hard task for me. Hahaha cos I am going to Taiwan :(