For the remaining of the trip it will be difficult. I would try and go out for a jog or a walk if you cant get away on your own have a good cry in the bathroom to relieve some tention, have a long bath with a book and candles, maybe go swimmimg i find swimming relaxes me even if you dont go on your own, you can still get some space from them. When you get home maybe see your doctor if you havent already, see if you can get dome medication and therapy. Good luck. Also keep coming on here when you get a chance.