I Want More Self-confidence

Have u ever accomplished something in which after accomplishing it it made u wonder if u really wer the one who did it?

I lack self confidence big time.. Within just 2 months good things came pouring to me.. I passed the licensure exam.. I got a job offer after just two tries of job application.. I got another part time job where a few people who wer applying for it (who have the experience and i have none) wer not able to get it..

Theres a lot of blessing for me.. Yet since the day i passed the licensure exam it always occur to me if i really am the one who did it.. Was it really me who answered those questions.. Its just difficult for me to accept that it was me since i know i am not capable of those things.. Maybe its luck.. Or God's grace.. But its never me..