Sigrid Ellingsdatter

She was born in Sogndal, Sogn Of Fjordane 21 Apr 1737 to Elling Olsen Ruggeseter. I have looked for her confirmation starting with 1750 to 1755 and have not been able to find it. Her father died in 1757 while living in Sogndal. This led me to believe that if she was confirmed it would have been in Sogndal. Could someone take a look at this? Have gone over these records several times and still can't find it. Thanks