HAMSTER EMERGENCE HELP PLZ!?!?!?!?!?!?!?!?!!?

ok i don't think my hamsters ok.i mean i think theres somthing wrong with his leg he is being slow.um he was walking on the table and then he just kinda fell over but not completley like a slip but i just don't know what to do and i freaking out plz help me i love him to much for him to die but it might be somthing els plz i need all the adivice