I would have gone there if.

Hello,
Could anyone tell me if I get this right.
I tried to write to a friend whom I planned to visit but something had gotten in the way.

"*I would have gone *there if my mom didn't cancel the trip.
Or
"*I would have been *" there if my mom didn't cancel the trip.
Thank you like always

They are both ok.
Either sentence can be used.

There's a problem with the verb later in the sentence. It should say "if my mom hadn't canceled the trip."

The 'didn't' versions sound very wrong to UK ears. The 'hadn't' is so much better.