To know where a certain ‘mistake’ falls, between sucking a thumb and murder, requires judgment. If you don’t trust your own you can discuss that particular ‘mistake’ with (someone you trust/LOR/PhD/Popa bar Abby).
But do keep in mind that while having been Chutzpadik for a week wouldn’t define you, other things do. When a person has specific stuff in their past it is part of the wholesome picture of which a spouse wouldn’t want to be lied to.