2002 Honda Civic transmision

hi,......................

i lived in new jersey,i have a honda civic 2002 lx with automatic transmision.with no problem at all,all fluid change is up to date.currently 109.000 miles on it.

one day i hit the pot hole two times in a same day,
then after the 2nd pot hole that i hit, i drove a car like 2 miles then the transmision start acting up like slipping(not move at all),so i turn off the car like 5 minutes then i start drive a car again,and it was fine just for 1/2 miles then slipping(not move at all) again.so i have to tow my car home.until 2 weeks letter i start the car again just want to find out what happen, and it was run and drive fine just for about 1 miles only then start slipping again(not move at all).
oh yes the trans just get some oil change may be about 1000 miles with honda transmision fluid.
when i start the car after 2 weeks since the problem,its have a sound like whirling in the tourque converter area.not sure what it is.

so what should i do ?
is that a internal damage and need to rebuild or just a simple thing like a losse connection ?

thanks

Albert Hugo