Everything in this world is a creation, and every creation has a creator. Now that's an interesting thought right there. Hold it and relate it to something called confidence. Confidence sure should have a creator, and who else better than you could create it .It is by you for you. So it is quite clear and obvious that it either does not come from outside or cannot be created by someone else.
Confidence is self built, and is a self survival medicine you will need in life's first aid box. And guess what, you are your doctor and you alone can inject yourself with it. Some ways that have worked for me, and have helped me when I needed to get up, dust myself and move on.
An absolute friend of confidence, you would need it and just about from anyone would only make you perform better. The downside to it is, you would receive it as package of criticism. Having said that, just when you think you need a dose of confidence, speak to someone who ultimately believes in you other than you. It could be a mentor, your partner, a close friend or just about someone who had appreciated you for something small that you had done. Words are so powerful, and a different perspective is always what is needed.
Self Help sources :
Funny I call it self help 'sources' when the only source needs to be you. Not necessarily. You could read, browse, and simply spend some alone time reflecting on anything. But after your reflection, be determined to see your positives and focus on them. There has to be something that has brought you so far .Nurture it and make it aid you when you need it the most.
Skills and knowledge :
To continue to be confident, you would need to upgrade your skills and top up your knowledge. Be it in any field, when you spend some time learning and learning, confidence automatically pops right back up.
It is really ok to lose confidence as it is a natural process that all of us face. But at the end, no one is ever alone. You have your talents, your skills, your knowledge, and thus have confidence, and with that everything is achievable and the glory can be yours once again.