In 2008 I attempted suicide.
I have dealt with suicidal ideation off & on since I was around 7 years old. My brother committed suicide, and mental illness (including depression) runs in my family. I'm not crazy though, I swear :-)
I've read a number of people say things like, "It's completely normal. You just have to deal with it like everyone else." That's wrong, and really, really dangerous advice. Suicidal ideation is very different from feeling 'blue' every now and then. Suicidal ideation is an indication of something more serious, and if left unchecked can get much worse (did you read my opening line?). Not everyone can get out of depression on their own or with 'natural remedies'. Depression is an illness just like diabetes or hypertension. Sometimes medication is necessary to get better.
I'm glad to hear that you have an appointment with a doctor. That's an important step to take, even if you don't start medication or therapy. After my suicide attempt I saw a psychiatrist 2-3 times and never took medication or did any therapy, but it was honestly very helpful.
I wanted to say that point number 3 above is a huge key to getting better. Remember this: Thoughts lead to emotions, emotions lead to actions. If you don't want to commit suicide (the action), prevent what comes before it (emotions, thoughts). Don't think about suicide and you'll avoid feeling like suicide is the answer. It's hard, but it gets easier over time.
What also helped me--which my psychiatrist recommended--was to create and follow a daily routine. I freelanced from home at the time and found myself with a very erratic sleep pattern, I didn't exercise, and I rarely left my apartment. I got a part-time job that got me out of the house, stopped staying up until 2, 3, 4 in the morning, started exercising, and forced myself to do more socially with my friends. Now, I'm happy and productive.
As a side note, if you're interested in trying any natural remedies for depression, there are basically three options: 1) SAM-e, 2) 5-HTP, 3) St. John's Wort. I have listed them in the order of their generally accepted effectiveness for treating depression and, how would you say, time before affect? St. John's Wort typically takes 2-3 weeks (IIRC) before you start to feel it's effects. SAM-e is supposed to work with in a few days.
Hang in there man. Things are never as bad as you may think, and they will get better in time.