My wife is having pain in her lower abdomen. She felt nauseous and vomited only saliva. She had a solid stool followed by a more fluid stool. She is due for her monthly period, but she says this pain is much worse than she has ever had before. We were at a barbeque last night, so I am wondering if it could be food poisoning. She said she feels a little bit better than she did only twenty minutes ago. What do you think it is?