Hi, I returned from an all boys stag holiday 2 days ago, i banged my head on one of the nights out and i'm a bit concerned. I do'nt feel dizzy but feel really tired, I have also seemed to lose my appetite also a bit blurry eyed, initially i just put this down to severe dehydration due to lots of sun and alcohol, but feel I should be rehydrated by now and just dont feel quite right.