my boyfriend banged his head several times at the back..then 10 minutes later i tried speaking to him bt he couldnt talk then he starts shaking and shivering even tho he wasnt cold. this carried on for about 15/20 mins but now he's fine...do u think he's ok? please reply asap

You should get him to an emergency room to be evaluated asap. Better safe than sorry.

I agree that he needs to be evaluted ASAP. He could have a concussion or something else.