MIL cooked us a curry for dinner, I thought at the time some of the chicken tasted weird but didn't say anything as didn't want to be rude. I did leave some of though and said I wasn't hungry.
That was at about 5.30.
I've woken up with horrendous stomach cramps and now can't get off the loo.
Its food poisoning isn't it? 
I'm not looking forward to seeing if 3yo ds is the same.