Help With My Injured Budgie

My budgie must have hit the wall or something yesterday. Suddenly he couldn't land properly. And then we saw that he was bleeding from his eyes and nostrals. We put him in a separate birdcase with water and food in the bottom. We put a stick real low, and after an hour or so he was able to get upon it. He was also breathing heavily and with a noise. 

We of course called the vet, but they said that they could only take his life. We therefor decided to see through the night. 

Today, his breathing is a bit better. But he can't see properly because of the blood. There is old blood, not still bleeding. 

I guess he got a concussion. Can this go the right way, or should we take him to the vet for his final rest? I feel so bad for him.