Yes, all the time. People say why am I miserable if nothing is majorly wrong. It's more that I'm not happy because nothing is majorly right.
With me it is depression, I've had it since my teens and only got help for it when I was pushing thirty. I still get the feelings of sadness, numbness and feeling like life is passing me by (and I'm letting it). Those feelings are my default position. But at least I know why.
I would recommend you speak to a doctor about it. You won't lose anything by talking it through with them, perhaps you will be able to get treatment (talking therapy or medication - they don't try to "force" you onto medication if you are against the idea of it).
Certainly in my case it did me the world of good and I wish I'd seen a doctor ten years sooner. I just put it off because I assumed it was a phase I'd grow out of. But things like depression won't always go away on their own.
Perhaps try a questionnaire like this one. The hopeless feeling is a classic sign of depression, but that alone doesn't automatically mean you are suffering from it. But a questionnaire like that might help you focus on whether you think it is something you need to see a doctor about (again, personally I would recommend you speak to your doctor and tell them how you're feeling, especially if this is a regular occurrence.)
Feelings such as you have are nothing to be ashamed of. It doesn't mean there is something "wrong" with you. But if your natural thought pattern leads you down this route, then you can be helped to learn ways to challenge your thought processes and cope with occasions where your natural thought patterns are unhelpful to you.