I also agree that you would benefit from seeing a dr. If you can get some control over your depression it will be easier to control other parts of your life also. Depression can sneak up on a person and it can be so gradual that you don't notice what's happening until it is pretty bad. It can affect everything in your life and can cause self doubt, fatigue, fuzzy thinking, sleep disorders and other symptoms. That's why it would be good to get some help.
What Sam2 said about a support group would probably make things easier also.
I hope you feel better soon.