Hi thanks for contacting HCM...
Here you both have eaten outside foods ...
So yes it seems you have acute 
gastroenteritis secondary to food toxin..
It might be bacterial or 
parasitic infection...
Empirically 
ciprofloxacin 500 mg tablet BD can be given for five days ...
Drink lots of fluid to maintain hydration....
Avoid excess spicy foods ....
Non veg and heavy meal avoided ...
Small meal taken with frequent interval...
Rabez DSR also can be given for few days ...
Excess tea, coffe avoided ....
If still no improvement investigation needed with ....
-Stool examination 
-USG 
-CBC 
If stool show ameba egg than 
metronidazole and if other parasitic egg than 
albendazole needed ..
Take care
Advise : Consult physician and discuss your case along with examination......