"constant doubt" is correct and usable in written English.
It is a phrase often used to denote the feeling of uncertainty or insecurity one can experience in a certain situation. For example, "John's constant doubt about his career choice eventually led him to switch jobs."
I am stuck in this constant doubt... always reflecting and always in doubt.
It requires solitude and the constant doubt that your subject (which is artificial plants) is worth anyone else's time.
Setting sex up as a commodity and simultaneously warning women that if they don't snag a man in college they'll end up lonely spinsters also has the handy effect of, at best, keeping women in constant doubt about their choices, and sometimes of derailing their other plans.
Every time our work becomes hard, we are pushed toward an existential crisis, centered on what for many is an obnoxiously unanswerable question: "Is this what I'm really meant to be doing?" This constant doubt generates anxiety and chronic job-hopping.
In the last month, I have been held at gunpoint by my panic disorder at a constant doubt of survival.
The Campaign grew out of others' constant doubt that he belonged, out of the desperation for a chance to prove he actually did.
In his memoir, To the Castle and Back, he writes, "I have constant doubts about myself," and adds, "I blame myself for everything".
It is even conceivable - though unlikely - that the Islamists will win more seats overall than the ruling party.There have been constant doubts about whether the election would even be held.
His completely original voice and sensibility — a blend of sharp and always surprising observation, free-floating digression, ambiguous irony, impishness, tenderness, curiosity, and detachment, all overhung with constant, circling doubt — remain stubbornly resistant to all but ersatz imitation.
Writers face endless rejection, constant self-doubt.
Why is it, you might be asking yourself, that very bright, talented individuals clutching phenomenal CVs and apparently facing a world of opportunities, are suffering constant self-doubt, depression, anxiety and burnout?
