i do the same thing i just lose like 40 pounds and ever since then i have been obbsesed with gaining weight , i was terrified of gainig the weight ever again i weighed 105 and i was 5.3 and everyone kept saying that i was way too skinny and my mom made me gain 10 pounds bacause that was wat my doctor said that i dhould weight i was so mad but worrying dosnt help because it just makes u a worse person to be around everyone would nagg me about eating and people thought that i was anerexic because i didnt want to eat and i hated to eat whenio got a bad craving . brush ur teeth , or instead of just not eating whenu want to let ur self go eat just get reduced fat things ar get pretcels they r crunchy and tasty or start a project life drawing or needle work ,to keep ur hands moving and chew gum try it it may work