So I hemorrhaged after having my first & then was given a shot for my second to prevent it from…

So I hemorrhaged after having my first & then was given a shot for my second to prevent it from happening again & now the new doctor I have is telling me they wont give me the shot unless I show that I'll need it....but isn't that the whole point of the shot?! I talked to my husband about it & now he feels like I should deliver somewhere else. Idk what to do now because thinking about it after the fact isn't sitting right with me.