My pdoc said something similar to me. It was confusing as well because I know I get super down to the extreme from time to time. There are also other diagnosis' to consider that are very similar to depression, so you could have something else all together. A lot of mental illness symptoms overlap and seem like depression. You should consider going to a GP, pdoc or a psychologist and tell them how you feel. However, I think we all know ourselves the best regardless of what label people give us.