I feel sick

My stomach has been hurting for the past week or so and I haven't really eaten as well I eat very little like one snack per day, and I'm really hungry but everything disgusts me, and it's like my stomach is hungry but my throat isn't, and every time I eat I can only have like 3/4 bites before I get full or it starts to disgusts me, and it's like my stomach hurts because of how hungry I am, but I can't eat. What do y'all think it might be? Or what can I do?