Everyone has ups and downs. The fact that we have a great platform like steemit to share our thoughts with others makes it all better.
It's not a good idea to bottle up bad feelings.
I think you should try to be more introspective and open, just like you were in this post. It's important to know you're not the only one with these feelings, and it's even more important to know that they're just temporary. Sometimes you feel bad for no reason, and then your mind just finds a random reason. I suppose sometimes it's just neuroscience in action, depleted dopamine or unbalanced dopamine/serotonin. Whichever reason it is, everyone bounces back.
Hope you feel better Jerry!
Robert.