something is wrong with my dog.. ever since last night, he has not been acting like himself. He's usually very active and playful and always follows me everywhere and come when I call him, but since last night he's been just laying down, so listless and looks so scared and is shaking and panting really hard. he won't come when I call him and he just looks so scared and I'm so worried about him. I gave him a buffered aspirin in case he's in pain and tried to give him some medicine I got at the vet to ease anxiety with dogs in case he's nervous but he wouldn't take it. I was able to crush up the pill though and mix it with some yogurt and he did finally take it. I don't know if I should be taking him to the vet right now or wait and see if he feels better tomorrow? All the vets are closed now though but I think there is one for emergencies that's open all night. I don't get paid until friday though and my sister is still at work. I just hope he is ok, he's everything to me and seeing him look so scared and vulnerable is scaring me so much. He's not even 3 yet, but the last time he went for his anual physical the vet had mentioned she thought he might be getting some problems with his hips (hip displaysia I think she said) because of the way he was standing. I really hope it's not his hips or any arthristis that's causing him pain.. he's too young for that and I would hate to see him have to suffer with it

If anyone has any advice on what I should do.. if I should be taking him to the vet right away or wait and see how he feels tomorrow and then go from there? I can just tell something is wrong.. he's not himself, he is never this quiet and lathargic. I love him so much, I haven't seen him act like this since his episodes of having panno when he was a puppy, but I was told by the vet that it only happens when they're a puppy and by age 2 it goes away.. and he's almost 3 now. I know german shepherds are often prone to arthritis and hip problems, but he is so young.. way too young for that to be happening.

Please, if anyone could spare some positive vibes and feel better vibes for him, I'd really appreciate it. thanks