Eating unhealthy

I’ve been eating so unhealthy this whole pregnancy I’m 16w4d. 2-3 times a week my mom or I will cook food at home but the rest are order or eat out. I do eat fruits but not much veggies. I take my prenatal vitamins ughhh can this affect baby? My aunt scared me she said she ate unhealthy her first pregnancy that’s why her baby came out early as a premie pls help