Hi, Welcome to the site.
May I suggest you take the free depression test, print out the results and take them with you to a doctor? This will help serve as intro and icebreaker for you. The test does not diagnose, as only a foctor can, but it is an aid.
I believe that isolation is the enemy of depression. All work and no play is really tough on someone. To meet other people, have you thought of joining groups of similar interests? A book club, sports group, service club, all kinds of groups exist out there. If you look up 'hobby' in Google for instance, you can get all kinds of ideas. It need not be big or flamboyant interests. And with those interests, there are always clubs meeting to exchange info and to socialize. Check the newspaper for 'What's on' or check your local areas's Web site. They may have links to interesting activities.
Hope this helps. All the best.