I am sure I am stating the obvious when I say there is a huge diffference between depression caused by going through dreadful trials in one’s life when the system just says “Stop, I can take no more!” and the depression that rolls in like sudden fog without warning on a previously clear day and you find yourself grinding to a halt or weeping copiously while thinking “But I don’t know why I feel so depressed”.
It may be possible to address some of the root causes which grind us down or to alleviate their effect but the bottom line is supporting us to cope. Nobody should have to cope alone - others may not be able to take the problem away, but can help you to feel you are not alone in how you feel.
There is a place for counselling, for therapy, for offloading e.g.to Samaritans ( and no, you do not need to feel suicidal) and in some cases for medication, whether to help you sleep or reduce anxiety attacks.
Nobody expects you to cope unsupported after an injury, to walk without crutches after a broken leg, so nobody should need to face depression for whatever reason, unsupported.
Do please talk it through, possibly your GP is your first port of call, but Samaritans will not commit you to medication or indeed any course of action.
It does help to talk.