Provisional ballots are for voters and poll workers alike that encounter issues with an attempted vote, usually involving the voter's registration status. i.e. change of address, name change, name not listed in poll book, went to wrong precinct etc. All provisional ballots are researched thoroughly. If the voter is a valid Douglas County registrant and everything else is in order then YES, your ballot will count. If you end up voting out of precinct then only those races or questions that would be on your correct ballot will count.
If the provisional ballot is issued due to a voter not providing photographic ID, then that voter should submit their ID prior to the Official Canvass the week following the election. If you can provide your identification, then your vote will count. Contact the Election office for more information or if you have any questions.