I don't have enough info from what you gave us to say whether or not the doc made a quick judgement. Perhaps he knows a lot more than you told us.
Make sure you are eating correctly, getting enough sleep, and working out. You have to ask yourself if you aren't feeling right and need some professional help. (or if everyone else says you're not yourself) If so, then go to your PCP - you never know if your thyroid is malfunctioning, if you're anemic, or if there is something else that is wrong. If those test come back normal, then talk to a psychiatrist (if your insurance will allow). There is no shame in taking meds for depression, but you want to make sure you're treating the cause of the depression.
OH, one other thing, if you do end up on Wellbutrin - if the provider doesn't suggest starting slow (50mg for a few days, then 100 for a few days,...) then ask him/her about doing that. It helps minimize the side effects, and the dosage you need may be different than what they prescribe. You may function just fine with a lower dosage. My bf's stepmom functions best on 100mg, and her first psychiatrist started her at 250mg. Needless to say she couldn't handle that amount at all. But by stopping the med, starting over at 50mg, and slowly increasing to 100mg she was able to alleviate her symptoms without medication side effects.