Taking you on face value, and that you are serious and not a troll..... (apologies if this is not the case!)

Your puppy REALLY needs to go to the vet right away if you suspect a broken leg. He or she will be in unbearable pain and need immediate pain relief.

I have no idea of costs, do you have insurance? If the leg is broken it may run into the thousands. However, vets are legally obliged ot relieve your apet of it's suffering, so they have to give it basic treatemtn even if you can't afford to pay.