I read about Lepto on here the day before my Chewy had his Rabbies shot. I talked to the vet and it turned out my vet will never give Lepto unless the owner asks for it and it is a hunting dog. he said you can give meds for Lepto if caught in time. Humans can also get Lepto! He dislikes it so much he doesn't keep it in the office.
Sorry your baby is so sick... Fell better soon baby I'll pray for you!