Urgent question

Hello everyone,
I'm new to this forum, but I'm here because I have a question about my new conure. I got a green cheek conure about a week ago, and so far everything has been fine. He got checked out at an avian vet last week, they took a fecal sample and I got the results today, they said there was nothing bad there, but also not much good so they're putting him on something, I cant remember, I haven't been able to pick it up yet. But they said it's not urgent
Tonight I went to put him to bed, he went to his food and started eating. I noticed his tail was hanging funny, a bit to the side so I picked him up. He didn't seem to want to stand upright, he kept sort of falling back, so his tail was straight up and down kind of thing, and his tail was pointing off to the left side.
My question - is this because he's sick, or is it just because he's really tired? It's a little later than he usually goes to bed, is this how conures act when they're very tired? I'm going to keep checking on him every once and a while, but if anyone at all could help me with this question I would appreciate it so much.
Thank you in advance,
Angela and Sam (my GCC)

Sorry I didn't get to this urgent question more urgently. I'm not sure why he would be standing as you describe, it could be a result of something dangerous, or as you yourself said he could just have been tired. If it is the latter checking in on him every hour will only make it worse. I hope you have left him to get a good nights sleep and done the same for yourself. If he is still doing it then you can bring it up with your vet when you pick up those medications.

Do let us know...