Generally not. However, adding some details would be helpful. Are you male or female? How old are you? If you're female, could you be pregnant? If you're female, is it time for your period?
Is the food you ate something new to your diet? Was the food spoiled? Were you around anyone who recently had the flu?
When you submit a question like this, you need to include SOME details on who you are and the circumstances so you can get more accurate information back. As it stands now, I don't know why you were sick. It could be that something you ate or drank upset your system, you got sick and now you're done.