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Dear LW,
You say that you are suffering from depression, that you have in the past, and that you are considering medication. You also say that you are thinking about quiting journalism. Perhaps it would be best to stick with the journalism until you deal with the depression.
Medication may not be enough to cure the depression. Sometimes talk therapy is needed, along with the meds. In any case, the depression distorts your view of the world and yourself. It would be a shame if quit journalism and then found out later, after the depression was cured, that you made a mistake. Your good grades seem to indicate that you are doing something right.