According to Osho, you cannot stop worrying by effort; the very attempt becomes a new worry. Drop the fight and simply watch worries, indifferently, as clouds or passing traffic, without feeding them with concern. In pure witnessing, they lose energy and fade; a gap of inner emptiness appears, where your Buddha nature is glimpsed and life becomes a benediction.
Don’t try to stop worries; just watch them come and go like cars, and they fade by themselves.