Timboishere

Most likely its just climate change or jetlag. Other options are 1) red meat was heavily salted, much more than you do at home - don't know specifics of your order, but maybe. Or 2) it's just unrelated headaches that just randomly happened after eating out like this.

If you REALLY need protein powder for recovery and nutrition purposes - you can either use plant based one like Shadow recommended, or try to find egg-based powder. Other option is just consuming a high amoung of egg whites I'd say(As far as I know eggs are allowed on Whole 30).