In Pain & Vomiting

My dog is an 8yr old 70lb lab/terrier neutered male. Two days ago he began whining especially when laying down, so I touched along his legs and his front leg seems to he troubling him. He kept pacing and couldn't lay down because it hurt (I eventually made a pile of blankets to see if he could lay on it, and he did!). Yesterday he began limping, so on a whim I went and bought Vetality canine asprin for large - xlarge dogs, I didnt google it beforehand because I assumed if petsmart only sold that pain reliver it was probably good stuff. I gave him two tablets as directed at about 9pm last night. Since then he has thrown up bright yellow, foamy bile about four times overnight and today. He did not get any relief from the medicine either, he is still in pain and limping. I dont know what to do and now I'm worried I made him I'll with the Vetality canine asprin. Of course google sent me down a rabbit hole and now im panicking about asprin poisoning, but I can't really afford a vet visit right now unless its an emergency. How can I help him? Am I worrying too much? He's had pain in his legs before (he runs the perimeter of the fence chasing neighbor dogs so I think he pulls his muscles a lot) and it normally resolves in less than a week on its own. I felt in between his paws to check for any thorns or anything and it all feels fine.

Hello - about the Asprin.  If your dog eats anything like that and you're not sure about it, call your emergency vets.  I know theres generally an expectation amongst owners that vets will ask to see your animal anyway, but it's not true - if you know your dog's rough weight and how much Aspirin in a tablet, they can quickly check whether they need to see you or not, then and there over the phone.   It pays to check - saves a night of worrying and sometimes even saves your dog.

Second, are you sure this is leg pain, not for example abdominal pain (pancreatitis).  A vet would feel the joints and abdomen and try to localise the problem.  Assuming that it did come from the leg, it could originate in any joint or muscle or the skin.  We are uk based and in the UK there is slim culture of self treating for veterinary problems, because without knowing the true problem it is difficult to get the treatment correct.  I am not allowed to advise someone else's client about drug doses.  Please call your emergency vets and ask for the case to be triaged over the phone immediately ( ask about costs first.  In the UK this would often be free).  Hopefully they can help you to work out your next step.

Intermittent lameness is often caused by arthritis in labrador breeds, so this is something to think about.  However the current problem appears to be frequent vomiting (and a recent history of lamess, plus the Aspirin dose alrsady discussed) - and this can dehydrate dogs and be a sign of underlying concern, so we do think that its worth getting triaged.