There is a Tree in Asia called Chinese Bamboo. Its seed stays underground for 5 years without germinating but when it does, it grows 80 Feet in 6 weeks. 

What is important is not how long it delays but how fast it grows.
Chinese Bamboo, Spoke To Me!
Don't give up on your dream no matter how long it stays underground. It's just laying a foundation to shoot. It's not Dead; Continue watering it. Remember delay is not denial.
Trust in God, focus and build, He will raise your Banner.!