Can't eat, whenever I eat something I get so sick

Whenever I try to eat anything I get so sick to the point I regret putting anything into my mouth. I always feel nauseous and hate the smell of food in the morning, it gives me diarrhea just smelling food. I can only drink coffee in the morning but even coffee makes my stomach hurt but still is okay to deal as long as I don't eat anything with it. Whenever I eat something I feel like I will throw up but I don't I feel like I got punched in the stomach and the food js does not want to go through my stomach. I can only eat small snack but my stomach can only accept so little that I mostly live on beverages and fiber bars know. I don't really go to the bathroom only for number #1 I don't have any bad bowl movements but I do have a lot of gas at times when trying to eat something. This has been happening for so long now that I really don't like eating anything at all I drink a lot of water and have the smallest snacks possible my stomach doesn't accept anything else. If I try to eat I end up feeling the worse cramps ,not cramps but literally like someone has punched me so damn hard in the stomach that I can't breath and I js want to vomit but can't. Is this something I should worry about?? I'm 19 and a female