Two of you had the same symptoms then there must be something in that dinner that might have caused all this.
May be you have taken some additive appart from McDonalds as well.
I am not vouchsafing Mc but you should consider all contents of dinner rather than only Mc.
I came across a report yaers back from India that a few respected Brand of Beer were mixing Oxytocin
in there beverage to produce a kick to boost sale!
I would advise you to have word with higher authorities at Mc