I think you could probably handle the appointment on your own. Sooner or later, you'll have to do adult things without a mother's help. On this occasion, or another soon, you might try going it alone and see how it goes. You can write down your symptoms, problems, issues ahead of time so you know what words to use. The doctor pretty much shapes what happens in the visit, anyway.
I'm sorry you've been sick and hope it turns out OK for you.
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A finger in every pie.