I ate out of date food, and now feeling sick. Is out of date food dangerous, or just my imagination?

Maybe. Unfortunately, you probablyare ill from eating bad food. It can cause stomach indigestion, bloating, nausea, vomiting, diarrhea. If it has a serious bacteria you may have more severe symptoms and may need to see your physician. Unfortunately, you need to let it pass on its own. The lesson is don't eat expired food, food that has been sitting out overnight, made in unsanitary places.