According to Osho, you still doubt because the mind divides reality into polar opposites; the “trust” you know is merely the other side of doubt. As long as you choose trust against doubt, the pendulum will swing back. Real trust is choiceless awareness—transcending both trust and doubt. When both are dropped, boredom and oscillation cease, and a deeper, non-dual confidence in life naturally flowers.
Your trust is just the mind’s opposite to doubt, so it keeps swinging; stop choosing sides and simply watch, and both fade.