Does it need to be more than that?
I haven't read your book, so I don't know. What do the beta-readers say?
Based on everything you're telling me, though, the doctor isn't important enough to even be in the story, far less in the opening.
Is there a way to kind of correct this? To know how to write internal conflict without repeating myself a lot, creating another issue or problem after the first one is "solved" or at least partially put aside, and to help all of the other problems I mentioned.
Sounds like you shouldn't be writing purely internal conflict. Pair the internal conflict with external action.
Advance the plot. If you're ever unsure of what to do next, advance the plot. "When in doubt have a man come through a door with a gun in his hand...."
Note
Hamlet. (Shakespeare's version, which was a remake of an earlier play that no one who isn't going for a PhD in Elizabethan Literature has even heard of, let alone read, and that hasn't been performed in half a millennium.) Hamlet, the character, has all kinds of internal conflict. But he's also mixed up in sword fights, leapings-into-graves, stabbings-through-the-arras (and liver), ghosts, suicides, and honest-to-goodness pirates. Keep stuff happening and the internal conflict will happen along with it.
Next:
Today's Literary Trivia: An
editor was originally the person who put on a Roman gladiatorial game. He was the person who gave thumbs-up or thumbs-down on who in the arena would be allowed to live or die.
In the same way, today, an editor is the person who gives thumbs-up or thumbs-down on words, sentences, paragraphs, or plot-lines, and who determines which books will be published and which not.