Any Vet. students or Vets. out there ? .. My 5 month old ..?

My 5 month old Chihauha .. was neutered this past Tuesday .. I took him ( and his brother) home. Juno, (the brother) , was fine .. Switch , seemed to be more quiet . . thought he needed more rest .. to make a LONG story shorter .. Switch started bleeding from what seemed to be the penis ... NOT where the stiches are. The Doctor admitted to me today over the phone that he "nicked" the uretha .. and didn't want to "worry me" .. so he said nothing . . so when he started to bleed at 1:30 in the morning .. I brought him into an emergency hospital ( the Bill was $230.00) .. my doctor said there is nothing to worry about and that the bleeding will stop completely soon. But twice today, he has had more bright drops of blood come from the same area.. drippiing on the plastic where he and his brother are penned. The most important question I have, is how can I (or that doctor) .. be so f**king sure that this will heal over properly? What would you do ??? Thank you !!!