hospital?

Not likely that severe unless the disease went misdiagnosed for a long, long time and one developed Lymphoma as a result (the risk of Lymphoma is significantly higher in untreated Celiac disease, but this risk returns to normal if one eats a strictly gluten-free diet)...

If one has Celiac disease, the immune system attacks healthy cells when it sees gluten.  This means no gluten is ever safe for a person with Celiac to eat.

If you have celiac then gluten free for ever is the way you have to go , i first went gluten free after a few months i cheated big time and got so sick , dr said once your body cleanses its self the reaction to gluten for most is worse than befor cause your not use to it being in yoru system. I hope you dont have to get hospitalized , i hadnt heard of that but i dont know any other celiacs in person. good luck