I ate breakfast this morning and nothing else since then ive been out shopping and when i got in ive loose stools why?

At this time your symptom is nonspecfic & could be from food intolerance from yesterday, from early viral intestinal tract infection or irritability of bowels from rushing around,etc. For now,rest up, drink adequate fluid amounts, eat only soft,bland foods and,if needed, take meds like kaopectate or imodium according to instructions if loose stools continue. Check with your physician as needed.