i think it doesn't hurt to question a bit more since you're feeling depression doesn't quite capture your experience. You mentioned you saw your doctor but it might make sense to see a psychiatrist to get a full diagnosis. The doctor would be a good choice for a check up, lab work, check your hormone balance, thyroid, that sort of thing. The psychiatrist might be better equipped to determine what sort of brain chemical issues you may have. Without knowing more about your personal history and tests done it's hard for anyone to say definitively what's going on.

Often times people are misdiagnosed repeatedly until the right one comes along. i doubt treatment for depression would be detrimental as it is too often part of the overall picture. At the same time, i think it's ok to trust your instincts too and look into it further.

Best wishes on your journey.