The pain you’re experiencing is a blessing from the Almighty. Pain teaches you how to focus and concentrate on your acts of worship. Pain teaches you how to ask the Almighty with a pure heart. So don't complain about it.
This world is temporary. You’re on a journey. You’ve not reached your final destination yet. An eternal abode awaits. The Hereafter. So quit stressing over everything that happens. Nothing lasts. Let the Almighty take over after you’ve done your best.