Talk to Gastroenterologist on Food Intolerance

Salam, dear doctors I ate little sweets 3 days before late night and in the morning I woke up with nausea and later vomiting. I didn't eat anything whole day and it was fine. Pardon me I ate same sweets (as I didn't know it was the cause) and feeling discomfort in my abdomen like fullness, mild bloating and nausea. Should I take some anti allergic or antibiotic or omeprazole to avoid symptoms overnight? Regards