Cant hold anything down but peanut butter and jelly. what could this be

Peanut butter soothe: When your belly isn't feeling so well, you often don't want to eat . But it's important to still give your body the vitamins and minerals it needs to get you back on track. Having even a few spoonfuls of some creamy, natural peanut butter—we're not talking sugar-added-type—will provide you with both vitamin B6 and magnesium. Peanut butter is known to calm your stomach. U can take Kefir/ Ck Soup.