I've had this happen to me. After prayer for a troublesome situation, I at first feel good because I brought it before God. But almost immediately after the prayer, a "reminder comes that the problem is still there, making it look like I wasted my time praying if it had no effect. Worse yet...
I'm surrounded by non Christians they don't know the lord and I'm asking to be filled by the holy spirit. I also asking to that I can counterattack and the spirit counter attack the enemy.