Stomach Flu Symptoms, Farting Are These Symptoms Of Stomach Flu?

Are these symptoms of stomach flu? - stomach flu symptoms, farting

OK, are my symptoms:
Constant stomach pain, 5 days
"More than the usual amount of burping / farting after eating or drinking
Headache-tiny
"Very few mild constipation (usually go 2-3 times a day this week, once per day)
-Stomach cramps

Four members of my family was sick last week 3 of the suspected poisoning "food", another "High Voltage". I say, it could stomach flu, but they deny. Emetaphobic and I have a high level of stress, so I do not know if me everything possible to prolong or symptoms of stomach flu. HELP!