Hey My friend dont worry everything is going to fine.......Take a long vacation and dont look at the books for another month.then again come back to fight once more. Whenever i am in a situtaion like you are i always think of one story that is:
There was a king who had tried to capture a kingdom many number of times but he always failed to do so.This time after agian failing to do so he was shattered as he had lost everything: his kingdom, his loyal men and was hiding in a cave as he was bing hunted by enemy. He decided to leave the hope of suceeding.There in that cave he saw a spider who was trying to climb the wall but as the wall was slippery he failed to do so but the spider kept on trying and trying untill he finally suceeded to do so.So king got the inspiration from him and thought of trying once more.(
Now I have modified the story from here)but this time king tried to find why he was everytime failing as he was stonger than that king and he had larger army than his friend so he did some quantatitave analysis and found that there was a loop hole in his plan whenever he tried to attack he did that from the strongest side of his opponent where he was invincible .So he redrew his plan and again gathered his resources to attack his opponent but this time form a different side and met the sucess in the end.
So Moral of the story is retrying is not enough But retrying with the correct armament and with the correct plan is more important.........
I know i am very bad at story telling but believe me i tried my best