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Longman Dictionary of Contemporary English
self-doubt
noun
EXAMPLES FROM CORPUS
▪ But momentum was the thing - self-doubt came sneaking in as soon as they let up.
▪ But tormented though I was with guilt and self-doubt, I knew I had crossed the Rubicon.
▪ Check his scorched-earth vocals for the sound of self-doubt.
▪ It had been a year of hardship and self-doubt, but for the most part the new managers had persevered.
▪ Neglect yourself and self-doubt begins to creep in and that swiftly turns to depression.
▪ Pete Sampras's opponents might have hoped he was going to disintegrate in pain and self-doubt at this Wimbledon.
▪ The seeds of self-doubt germinate easily in such sad soil, and flourish in such desolate climates.
▪ They are often shy, fragile, and preoccupied with feelings of self-doubt.
Wiktionary
self-doubt

n. The doubting of one's own abilities.

WordNet
self-doubt

n. lack of self-confidence [syn: diffidence, self-distrust] [ant: confidence]

Usage examples of "self-doubt".

For a moment he was plagued with self-doubt: could his bushcraft be deserting him on the strange new world?

But all I do know is that this is no time for self-doubt, not with Eames out there.

Still, as expected of him, he stepped in as head of the family, and as time passed, those expressions of self-doubt, the fits of despair and self-consciousness that had so characterized the outpourings in his diary, grew fewer.

The well-muscled frame of the tall, broad-shouldered, wide-browed young man, brimming with self-confidence and optimism, had no room for self-doubt.

Also, if you are expected to be a strong, unemotional, independent, competitive, and aggressive "tiger" at work, it is hard to come home and be a "pussy cat," being an interdependent equal, washing the dishes, bathing the kids, sharing your self-doubts and remorse about conflicts at work, and being soft and caringly intimate with others (Fasteau, 1974).

His head was cleansed and future clear, without a shred of self-doubt.

But, no: for all her self-doubts and newly acquired hindsight, she had to admit that at the time she left Tau Ceti, the job with Descartes seemed the best possible path for her to take.

To a person untouched by self-doubt, the wails heard today about the anguish of modern man as he confronts the question "Who am I?

A fishy man loved to kill whales and lacked the tendency toward self-doubt and self-examination that could get in the way of making a quick decision.

His taciturn, solitary nature had hardened him against self-doubt, and his harrowing escape from the maddened Gnomes in the Pass of Jade had drained him at least temporarily of any fear of death.

People like Neil Kaas, a Luton fan who took me and my half-brother to watch Arsenal at Kenilworth Road as his guest in the days when Luton’s ban on away fans was in operation, are obsessives with all traces of timidity or self-doubt removed.

I felt constrained by performance anxiety and distracted by the press circus, and I wished I could have just shown up unannounced and ridden without a word, fighting through my self-doubts anonymously.

Have you decided to unman yourself with the dissembling cowardice, the whimpering self-doubts that your race proudly rationalizes as conscience?