Thank you, for this and your other comments! I wish I had known this to begin with. I will be doing this going forward.
I've fallen so hard for reptile keeping because I like minding the husbandry and keeping them clean, so I had hoped this would never happen to me. I never imagined a breeder would sell a snake that could be sick, or in this case, not warn me when they knew there was a chance a snake I bought could get sick. I know it's buyer beware, but these are living things and I thought breeders would care more. Big wake up call.