Yes, I have had prayers answered in concrete, provable uncanny ways, but don't care to discuss it.
The thing is, who knows that God himself answers prayers? Seriously, I don't really know the answers but some speculation or flight of fancy would bring one idea to mind, this is slightly tongue in cheek: perhaps there is someone looking after you, maybe even a staff of people looking after you, in charge of your prayers.
Scenario: you are playing baseball on a team and you pray for your team to win. Someone on the other team prays for his team to win. His staff is bigger and better than your staff, so his team wins. Maybe your staff hates baseball and wishes you did, too, so they make sure your team doesn't win. Maybe your team needs so many votes/prayers in order to act. Maybe the game goes to the team with the majority of people praying for its victory. Maybe your staff is addicted to Candy Crush Saga. A humorous example to show that prayer would not be a simple, you ask for it/you get it. I'm not a Christian. I'm a universalist. Yes, I do pray sometimes. No, I don't have the understanding of prayer that fundamentalist Christians do.