I feel under some extreme depressive state right now, is there anything I can take or eat to help myself?

Please get help. Extreme depression is a serious condition but is quite treatable. You may very well benefit by taking the proper medication, often combined with psychotherapy. Sometimes therapy alone may be the treatment of choice. There are many causes for depression which is why you need a mental health professional to help you figure out the best treatment. Eating a health diet is always a good idea.
There are lots to do. Call friends who uplift you, exercise, eat healthy, do things that cheer you up, music that's upbeat but most importantly seek professional help.