Help me lol. I can't seem to eat enough. My diet is working very well I think but app says no

Hello. I'm motivated to lose weight as well. My only issue is I can't seem to eat enough. I'm under calories every day but now when I try to cheat to bring up I almost gag. Guess it's working cause I lost 14 lbs in three weeks. I went from a size nine to a size five!!!!!! Any ideas on ways to boost calories healthy