Mwita, try sharing with us here your reasons for losing that confidence and you just might regain it in no time. You may simply be suffering writer's block due to physical or mental fatigue; every writer, whether aspiring or professional, experiences it once in a while. Don't allow it to fester through inaction, though, and don't ever wallow in self-pity. Keep on writing--even if it's only one short posting here or just one brief e-mail to a confidante at a time--until your old self-confidence returns. I'm sure that your best writing is still to come, but you mustn't stop going for it.