Extreme lethargy following double tooth abscess and food poisoning?

If you were traveling outside of USA when alleged food poisoning occurred, could be many bacterial things going on depending on where you were when you got ill. Having recent dental infection and treatment may have made you more prone to getting a bacterial infection from a food source that may have gone systemic on you. Make sure you let the doctor know where you were traveling and what you ate that you believe made you ill. The doctor may want to perform specific tests according to what you may have been exposed to. Good luck & feel better soon.