Unsure of how far to push my doctor for reassurance

If you need reassurance and it won't cause any harm to get it, insist. Your body, your rights. You need to sleep as well as you can at night and if you need more info that's perfectly understandable. You've gone through the wringer and now you're going through it again you poor love! Whether or not you're being paranoid is neither here nor there. If you're worried about something, you're worried. A good doctor will understand. K xox