It is normal for it to take a while to fully recover from a gastroenteritis, as it can cause lingering symptoms like changes in bowel habits for a few days to a couple of weeks. If you are still experiencing symptoms like diarrhea or abdominal cramps that are worsening, or if your symptoms persist beyond two weeks, it is advisable to consult a healthcare professional. Particularly if you notice concerning signs such as blood or pus in your stool, or if you develop a fever, it is important to seek medical attention promptly. Probiotics may help speed up your recovery process, but it is always best to err on the side of caution and seek medical advice if you have any doubts about your condition.