Translation of schier

I hope you could understand my last letter to you. You see, when I write in Spanish I am not very confident. I always question myself and each and every sentence takes about fifteen minutes.
We all know that the consequences are awful. All are struggling, some kill eachother, mostly for really foolish reasons. They are not aware of it. Drugs should never be tolerated in any country.
I called the Hilton hotel in Cuba and asked them whether it was worth coming or if they suggest to postpone the arrival. Their response was clear: Don't come unless you really have too.