I've never met a completely "sane" or "normal" writer or artist.
What you described sounds vaguely like how I feel at times, and I've spoken to others who have described similar thoughts. I always found it helpful to write a sort of diary, but in third person, and in the style of fiction. I suppose it felt like once I'd written these thoughts down, I'd freed myself from them.
Of course, there's no guarantee that will work for you, but I'd recommend it. If you feel led (by your mind, by external events, by your heart, by your thoughts of conversations) to write something, do it! If you don't, you'll almost certainly regret not doing so later.
I find it very helpful in times of confusion to write. Then, a couple of days later when I've collected my thoughts and my head is clearer, I read it back to myself.
For now, I encourage you to stop worrying and write!