What Causes Fainting And Weakness In Legs After Partying For Long Night?

after a long night partying i,as usual felt sick,vomited and then blacked out hitting the back of my head on a concrete footpath. when i was helped to my feet i found that i had a feeling of being on a spring ,everything was bobbing up and down, almost like my brain was telling me what to do and then a fraction later my body would respond. it has been a week since this happened and the feeling is still there. when i try to jog it feels like my legs have gone to sleep and are hitting the ground before i expect them to