I looked on the ccensus, parish registers & BMD indexes and could find no trace of her. Could Sheila be a nickname, or a variant of Cecilia?
The Irish BMD index on familysearch.org has a birth of a Cecilia O'Hanlon in Oct-Dec 1894 in the Lurgan civil district which is very close to Moy (17 miles). This Cecilia (or Celia) O'Hanlon appears on the 1901 and 1911 census with her parents Hugh (b 1838) and Sarah Ann (b 1861).