He/she can thoroughly evaluate you, offer an accurate diagnosis, and then dicuss treatment options
Depression IS very manageable and treatable. It takes some time, and it takes some trial and error, sometimes ewith different medications, but it is possible to get it to a much more manageable place. It's definitely not something you want to ignore, or try to handle on your own.
So, get yourself an appt, if you cannot go directly to a psych, then your PCP is a good starting place.