One of my budgerigar's wings recently started trembling. After some of the day I watched him attempt to fly (mind, he is young and clipped, though does flutter around at times) but he just fell to the ground. He's also been fluffed lately. I'm worried he's injured, and my family doesn't really put my birds first, so it's very unlikely we'd visit a vet, so here I am. One thing to know, he recently lost one of the primary feathers originally left when I bought him clipped around a month ago, (the incident was 2 weeks ago). He was bleeding a bit, but I made sure to put a stop to that quickly. I'm not sure if that has to do with this. Maybe he's unbalanced? But then why would he be able to fly for the past two weeks? I would highly appreciate a quick answer, because I have no idea what's wrong with him and I'm afraid there is no time to lose. Thank you.

If you "want a quick answer" with "no time to lose" then go to a vet. That is the responsibility of pet ownership.

Sadly it sounds like he may be sick. Birds fluff up to keep warm, so maybe turn up the heat a bit in his room. Also, a budgie losing even a small amount of blood can be fatal. But you said the bleeding incident was weeks ago so that really shouldn't be what's causing this sudden behavior.

If the vet is out of the question, which frankly most vets know nothing about birds, try adding more calcium to his diet and feed good quality food. A good source or protein for birds is eggs and egg shells. Hard boil the egg, give a bit in his food. Crunch up the shell until it's a fine powder, add it to his food.

That's really all you can do for him right now if a vet is out of the question. I hope he's OK.