appetite loss

i recently became vegan after being vegetarian for three months i went cold turkey on meat. i never was a big meat eater anyway all i ate was chicken. so the transition was pretty easy but lately i’ve lost my appetite i force myself to eat i might just eat two-four bites of something and not want to eat it no more. im a huge snacker i would wanna eat a big bag of chips over a meal. i dont have a taste for nothing im also trying to gain weight but im losing it dramatically!! HELPPP😭😭😭